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  • 1.
    Adolfsson, Jonas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Vad kännetecknar en bra idrotts- och träningsmiljö för elitsatsande inom längdskidåkning2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syfte

    Syftet var att ta reda på vad elitaktiva inom längdskidor anser vara en bra idrotts- och träningsmiljö.

    Metod

    Metoden som används är uppdelad i två olika ansatser. Den första ansatsen är inom den kvantitativa forskningen och utformades som en enkätstudie, där längdskidåkare har fått svara på frågor om sin träningsmiljö. Den andra delen av uppsatsen är utformad som en kvalitativ studie med semistrukturerade intervjufrågor baserat på ett mindre urval av de som svarat på enkäten. Detta skedde efter att resultatet av den kvantitativa studien blivit analyserat, för att utforma en intervjumall från enkätsvaren, i syfte att försöka få en djupare förståelse av detta problemområde.

    Resultat

    Resultatet visar att det finns en stor komplexitet i uppfattningen om vad som anses vara en bra träningsmiljö för längdskidåkare. Dock kan det urskiljas att vissa faktorer som viktigare än andra, till exempel vikten av att ha träningskamrater och god sparring för att kunna utvecklas. Värdet av att ha en tränare ansågs också viktigt. Resultaten visar även hur den elitaktive upplever sin träningsmiljö i dag och vad som efterfrågas.

    Slutsatser

    Det framkom tydligt att bristen på hjälp upplevs stor bland seniorer inom längdskidor. Att steget mellan junior och eventuellt gå på ett skidgymnasium, till att bli senior upplevs alldeles för stort, att det inte finns tillräcklig stödfunktioner, skolor eller träningsgrupper att tillgå som senior.

  • 2.
    Alf, Viktor
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Lindberg, Linus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Kartläggning av tillslagsprecision i fotboll2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this study is to analyze if the precision of a shot and a pass differs between professional youth players (16-18 years) and senior players (22+ or older).

    Method

    A total of 30 elite players which were 16 males and 14 females performed tests in shooting and passing precision. The set-up on the test days were a total of 60 shots(30 lying still and 30 half volley) and 80 passes (20 lying still best foot, 20 rolling best foot, 20 lying still next best foot and 20 rolling next best foot). The test results were analyzed using Excel and Kinovea. In these programs the mean value and standard deviation for each player and test group could be calculated.

    Results

    The result shows that there were only significant differences in one of six parts regarding precision on the men's side. On the women's side, there was no significant difference in any of the six moments.

    Conclusions

    The authors of this study identified a plateau between players aged 16-18 and senior players in terms of accuracy in passing and shooting. Players between the ages of 16-18 is as good as a senior player at the individual skills passing and shooting. This plateau can be the result of too little individual training so called isolated training in terms of precision. If the club coaches follow the training SvFF educate, only two minutes per training session goes to each individual skill (SvFF names 13 skills). The lack of time for these skills can be a decisive factor for why the development of precision stands still today.

  • 3.
    Andersson, Diana
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    ”Vegankost, övervikt och hälsa”: En litteraturstudie2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose

    The aim of this study was to investigate the effects of plant-based diets on

    overweight individuals based on previous research. The questions asked were: “Is

    there any evidence that suggest positive effects of plant-based diets on blood

    pressure-, blood sugar-, LDL-cholesterol- and blood lipids levels?” and “Is there

    any evidence that suggest positive effects of plant-based diets on BMI?”

    Method

    This study was conducted as a literature review containing 14 academic journal

    articles with a quantitative approach. The articles were found in databases such as

    PubMed (EBSCO), SportDiscus, Cinahl, Scopus and ERIC. A thematic analysis

    was used in the data compilation that seeks to identify patterns and themes of

    convergence in research. These following objects were researched in relation to

    plant-based diets: BMI, blood pressure-, blood sugar-, cholesterol and blood lipid

    levels.

    Result

    A number of articals showed that following a plant based diet gave significantly

    positive effects on health, such as lowered BMI-measures, blood pressure-, blood

    sugar-, cholesterol-, and blood lipid levels among overweight and obese

    individuals.

    Conclusions

    There is suggestive evidence that plant-based diets demonstrated numerous health

    benefits according to previously conducted research studies. Plant-based diets

    were shown to be effective in prevention of obesity by reducing BMI

    measurements in overweight individuals after following diet interventions.

  • 4.
    Andersson, Sofia
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Möjligheter till motivation för fysisk aktivitet: En interventionsstudie avsedd att motivera elever till fysisk aktivitet genom självbestämmande2012Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med studien var att under en femveckorsperiod undersöka möjligheterna till att förändra elevers motivation till fysisk aktivitet. Utifrån detta syfte formulerades följande frågeställning:

    • Vad sker med elevers motivation till fysisk aktivitet om den praktiska undervisningen utformas efter self-determination theory?

    För att utforma den praktiska undervisningen efter self-determination theory valdes Engstöms praktiker som en grund och stöttepelare i planeringen och genomförandet av lektionerna. Vilket gav en underliggande frågeställning till den ovanstående:

    - Vilka praktiker finns representerade i underökningsgruppen?

    Studien har genomförts på en högstadieskola i mellersta Sverige, där två klasser i årskurs (åk) 8 valdes ut att delta i studien. I undersökningsgruppen blev urvalet 14 elever och i kontrollgruppen 9 elever. Undersökningsgruppen genomförde en praktikenkät innan interventionen, vilken låg till grund i planeringen och genomförandet av lektionerna. De två klasserna genomförde en motivationsenkät före och efter interventionen för att mäta motivationsnivån. Resultatet av interventionsstudien visar att det skedde en viss förändring i de olika motivationsnivåerna. Det fanns dock ingen statistisk signifikant skillnad mellan test ett och test två på någon av motivationsnivåerna, varken hos undersökningsgrupp eller hos kontrollgrupp.

  • 5.
    Arnesson, Jesper
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Enberg, Anton
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Resultatinriktad idrott – ett problem för längdskidsporten: En studie om avhopp inom längdskidåkning2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Aim

    The aim of the study is to examine the dropout from cross-country skiing after high school and how elite associations with connection to university, attractive cities and support to elite athletes can prevent it.

    Design

    This study has a qualitative orientation where totally nine persons was interviewed. The study had four different target audiences which where dropouts, coaches from Dala Sports Academy, representatives from Falun and Borlange community and the Swedish ski association. Questions about dropout have been answered by all participants in the study but the questions about elite associations on senior levels were only answered by coaches, representatives of the communities and the Swedish ski association.

    Results

    All participants showed that bad results, interests beside the sport and that the conditions and support gets smaller at senior level was reasons for dropout. The dropouts also showed that lack of motivation was a reason for leaving cross-country skiing. The coaches, communities and the Swedish ski association intended that the enviroment in Falun and Borlange was good for running an elite association on senior level for cross-country skiing. They also provided that the economical part is important for an elite association on senior level.

    Conclusions

    The main reason for dropout in cross-country skiing is when the sport gets to serious and the focus only is on results. This leads to lack of motivation if the athletes don’t get the results they want. Only the best skiers can today participate in elite associations on senior level. To give more athletes an opportunity to train and compete in a high level as a senior the clubs can be more active with sponsorship so the resources expands.

  • 6.
    Assarsson, Hannes
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Skillnader och likheter i fartstrategi hos manliga- och kvinnliga- samt unga- och gamla skidlöpare i Vasaloppet2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 7.
    Backman, Erik
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Forskning om friluftsliv i Norge: reproduktion av det nationella eller nyfikenhet på det globala?2017In: Idrottsforum.org/Nordic sport science forum, ISSN 1652-7224Article, book review (Other academic)
  • 8. Bakkman, L.
    et al.
    Sahlin, K.
    Holmberg, H-C.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Quantitative and qualitative adaptation of human skeletal muscle mitochondria to hypoxic compared to normoxic training at the same relative work rate2007In: Acta Physiologica Scandinavica, ISSN 0001-6772, E-ISSN 1365-201X, Vol. 190, no 3, 243-251 p.Article in journal (Refereed)
    Abstract [en]

    Aim: To investigate if training during hypoxia (H) improves the adaptation of muscle oxidative function compared with normoxic (N) training performed at the same relative intensity.

    Method: Eight untrained volunteers performed one-legged cycle training during 4 weeks in a low-pressure chamber. One leg was trained under N conditions and the other leg under hypobaric hypoxia (526 mmHg) at the same relative intensity as during N (65% of maximal power output, Wmax). Muscle biopsies were taken from vastus lateralis before and after the training period. Muscle samples were analysed for the activities of oxidative enzymes [citrate synthase (CS) and cytochrome c oxidase (COX)] and mitochondrial respiratory function.

    Results: W max increased with more than 30% over the training period during both N and H. CS activity increased significantly after training during N conditions (+20.8%, P < 0.05) but remained unchanged after H training (+4.5%, ns) with a significant difference between conditions (P < 0.05 H vs. N). COX activity was not significantly changed by training and was not different between exercise conditions [+14.6 (N) vs. -2.3% (H), ns]. Maximal ADP stimulated respiration (state 3) expressed per weight of muscle tended to increase after N (+31.2%, P < 0.08) but not after H training (+3.2%, ns). No changes were found in state four respiration, respiratory control index, P/O ratio, mitochondrial Ca2+ resistance and apparent Km for oxygen.

    Conclusion: The training-induced increase in muscle oxidative function observed during N was abolished during H. Altitude training may thus be disadvantageous for adaptation of muscle oxidative function.

  • 9.
    Barker, Dean
    et al.
    Göteborgs universitet.
    Nyberg, Gunn
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Bergentoft, Helen
    Göteborgs universitet.
    What would physical educators know about movement education? A review of literature, 2006-20162017In: Quest (National Association for Physical Education in Higher Education), ISSN 0033-6297, E-ISSN 1543-2750, 1-17 p.Article in journal (Refereed)
    Abstract [en]

    This review paper identifies the conceptual underpinnings of current movement research in Physical Education. Using a hermeneutic approach, four analogies for movement education are identified: the motor program analogy, the neurobiological systems analogy, the instinctive movement analogy, and the embodied exploration analogy. Three issues related to logical consistency and its relevance for movement education are raised. The first relates to tensions between the analogies and educational policy. The second concerns differences among the four analogies. The third issue relates to the appropriateness of specific analogies for dealing with certain movement contexts. In each case, strategies for improvement are considered. The paper is concluded with a brief summary along with reflections on issues that require further attention.

  • 10.
    Batz, Tommy
    Dalarna University, School of Education, Health and Social Studies.
    Sexual activity as a recovery method for optimizing skeletal muscle hypertrophy. A Review: "When I get that feeling, I want sexual healing"2014Student paper second term, 10 credits / 15 HE creditsStudent thesis
  • 11.
    Bellardini, Helena
    et al.
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Henriksson, Anders
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Medical Science.
    Bra och enkla fystester2013Book (Other academic)
  • 12.
    Bellardini, Helena
    et al.
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Medical Science.
    Senior Power - Styrketräning för äldre2013 (ed. 1)Book (Other academic)
  • 13.
    Bellardini, Helena
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Mckee, Kevin
    Dalarna University, School of Education, Health and Social Studies, Social Work.
    The effect of gender on strength training in older people: a Swedish population study2012In: Psychology and Health, ISSN 0887-0446, E-ISSN 1476-8321, Vol. 27, no s1, 155-156 p.Article in journal (Refereed)
    Abstract [en]

    Background: Physical exercise contributes to healthy ageing, and strength training has beenshown to improve independence in older people.

    Method: Six hundred older people wererandomly selected from the Swedish population, and sent a self-completion questionnaire(57% response rate, n¼343) examining exercise history, current strength training, andperceived benefits and barriers to strength training.

    Results: Gender was associated with aperceived positive effect of strength training on quality of life (Women 42% vs. Men 27%).The most commonly reported benefits of strength training were better mobility (71%), energy(70%), and muscle strength (69%), with most benefits endorsed more commonly by womenthan men. The most commonly reported barriers to strength training were believing otherforms of exercise more suitable (49%) and cost (20%; Women 31% vs. Men 13%).

    Discussion:To better promote healthy ageing, interventions should be embedded in an understanding ofthe effect of gender on exercise behaviour.

  • 14.
    Bergkvist, Jonas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    5-årig åldersklassindelning är inte optimal för triathlon: En deskriptiv tvärsnittsstudie2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 15.
    Bergman, Stefan
    et al.
    FoU Spenshult, Halmstad, Sweden.;Univ Gothenburg, Sahlgrenska Acad, Dept Publ Hlth & Community Med, Primary Hlth Care Unit, Gothenburg, Sweden.;Lund Univ, Dept Clin Sci, Rheumatol Sect, Lund, Sweden..
    Bremander, Ann
    FoU Spenshult, Halmstad, Sweden.;Lund Univ, Dept Clin Sci, Rheumatol Sect, Lund, Sweden.;Halmstad Univ, Sch Business Engn & Sci, Halmstad, Sweden..
    Bergman, Anna-Carin
    Sannarpsgymnasiet, Halmstad, Sweden..
    Brorsson, Sofia
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Chronic Widespread Pain in Adolescents Is Highly Associated to Stress and Anxiety2015In: Arthritis & Rheumatology, ISSN 2326-5191, E-ISSN 2326-5205, Vol. 67Article in journal (Other academic)
  • 16.
    Bergström, Julia
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Särnö, Felicia
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Inkludering av nya motionärer på motionsanläggningar: Motionärers föreställningar om människor som inte motionerar2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose

    The main purpose of this study was to research the practitioners of physical exercise (PPE)

    opinions about non-practitioners of physical exercise (NPPE), regarding their health, lifestyle

    and characteristics.

    Method

    To enable inclusion of NPPE to training facilities where PPE attend, knowledge of the PPEs’

    opinions about NPPE are needed. NPPE often mention that the opinions of PPE discourage

    them from start to perform physical exercise at training facilities. Therefore, it was necessary

    to research if these opinions make an actual barrier for the start of exercise in NPPEs. To

    contribute this knowledge of opinions this study was a qualitative interview study with semi

    structured interviews.

    Result

    The respondents described health as a state of experienced balance between physical and

    physiological health. Unhealthiness was described by the opposite; imbalance. The

    consequences of this described imbalance are mentioned as fatigue, lack in concentration,

    overweight, high risk in diseases and decreased quality of life. What the respondents

    mentioned about a NPPE as an individual, were that they only did what's necessary, are

    unhealthy, lead an unbalanced lifestyle and suffer a higher risk of afflict the consequences

    mentioned above.

    Conclusion

    This study shows that the PPE do have opinions about NPPE. What is shown most clearly is

    that the respondents are more confident describing unhealthiness or the lifestyle choices

    associated with an unhealthy lifestyle, rather than describing the characteristics of unhealthy

    individuals. The study examines that the PPEs’ opinions about NPPE could be an actual

    barrier for NPPE to start performing physical exercise at training facilities where PPE

    perform their physical exercise. If these opinions are reflected in the environment of the

    training facilities, is not defined through this study and would require further research.

  • 17. Bishop, David J.
    et al.
    Thomas, Claire
    Moore-Morris, Tom
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Sahlin, Kent
    Mercier, Jacques
    Sodium bicarbonate ingestion prior to training improves mitochondrial adaptations in rats2010In: American Journal of Physiology. Endocrinology and Metabolism, ISSN 0193-1849, E-ISSN 1522-1555, Vol. 299, no 2, E225-E233 p.Article in journal (Refereed)
    Abstract [en]

    We tested the hypothesis that reducing hydrogen ion accumulation during training would result in greater improvements in muscle oxidative capacity and time to exhaustion (TTE). Male Wistar rats were randomly assigned to one of three groups (CON, PLA, and BIC). CON served as a sedentary control, whereas PLA ingested water and BIC ingested sodium bicarbonate 30 min prior to every training session. Training consisted of seven to twelve 2-min intervals performed five times/wk for 5 wk. Following training, TTE was significantly greater in BIC (81.2 +/- 24.7 min) compared with PLA (53.5 +/- 30.4 min), and TTE for both groups was greater than CON (6.5 +/- 2.5 min). Fiber respiration was determined in the soleus (SOL) and extensor digitorum longus (EDL), with either pyruvate (Pyr) or palmitoyl carnitine (PC) as substrates. Compared with CON (14.3 +/- 2.6 nmol O(2).min(-1).mg dry wt(-1)), there was a significantly greater SOL-Pyr state 3 respiration in both PLA (19.6 +/- 3.0 nmol O(2).min(-1).mg dry wt(-1)) and BIC (24.4 +/- 2.8 nmol O(2).min(-1).mg dry wt(-1)), with a significantly greater value in BIC. However, state 3 respiration was significantly lower in the EDL from both trained groups compared with CON. These differences remained significant in the SOL, but not the EDL, when respiration was corrected for citrate synthase activity (an indicator of mitochondrial mass). These novel findings suggest that reducing muscle hydrogen ion accumulation during running training is associated with greater improvements in both mitochondrial mass and mitochondrial respiration in the soleus.

  • 18.
    Bjerkefors, Anna
    et al.
    Gymnastik- och idrottshögskolan, GIH, Laboratoriet för biomekanik och motorisk kontroll (BMC).
    Tinmark, Fredrik
    Gymnastik- och idrottshögskolan, GIH, Laboratoriet för biomekanik och motorisk kontroll (BMC).
    Nilsson, Johnny
    Gymnastik- och idrottshögskolan, GIH, Laboratoriet för tillämpad idrottsvetenskap (LTIV).
    Arndt, Anton
    Gymnastik- och idrottshögskolan, GIH, Laboratoriet för biomekanik och motorisk kontroll (BMC).
    Seated Double-Poling Ergometer Performance of Individuals with Spinal Cord Injury - A New Ergometer Concept for Standardized Upper Body Exercise2013In: International Journal of Sports Medicine, ISSN 0172-4622, Vol. 34, no 2, 176-182 p.Article in journal (Refereed)
    Abstract [en]

    This study aimed to evaluate biomechanics during seated double-poling exercises in individuals with spinal cord injury (SCI) and to compare these with those of able-bodied persons (AB). 26 participants volunteered for the study; 13 with SCI (injury levels C7-T12), and 13 AB. A seated double-poling ergometer (SDPE) was developed. 3-dimensional kinematics was measured and piezoelectric force sensors were used to register force in both poles for calculation of power during incremental intensities. Significantly lower power outputs, (143.2 ± 51.1 vs. 198.3 ± 74.9 W) and pole forces (137.1 ± 43.1 vs. 238.2 ± 81.2 N) were observed during maximal effort in SCI compared to AB. Sagittal upper trunk range of motion increased with intensity and ranged from 6.1–34.8 ° for SCI, and 6.9–31.3 ° for AB, with larger peak amplitudes in flexion for AB (31.4 ± 12.9 °) compared to SCI (10.0 ± 8.0 °). All subjects with SCI were able to exercise on the SDPE. Upper body kinematics, power and force outputs increased with intensity in both groups, but were in general, lower in SCI. In conclusion, the SDPE could be successfully used at low to high work intensities enabling both endurance and strength training for individuals with SCI.

  • 19.
    Björkholm, Nicole
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Finn, Camilla
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Fem veckors träningsintervention utankostreglering påverkar intekroppssammansättningen hos överviktiga vuxna2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    PurposeThe purpose of the present study was to investigate whether relatively cheap and simpletraining intervention without food adjustments in a realistic environment can positively affectbody composition in only five weeks. The training methods the present study intended toexamine were high intensity interval exercise (HIIT) and low intensity walks.Methods14 adults with a body mass index between 25-35 kg/m2 completed a five-week trainingintervention without food adjustments. Relative and absolute fat mass and lean mass wasmeasured before and after the intervention with dual-energy X-ray absorbation (DXA). Thestudy subjects were divided into two groups where one group was instructed to complete HIITfor 30 minutes three times/week and the other group was instructed to complete three 60minutes low intensity walks three times/week at an intensity of 65% of their maximal heartrate.ResultsThe results did not show any significant differences in relative fat mass, absolute fat mass orlean mass in HIIT or low intensity walks after five weeks of training. p>0,05 for each value.ConclusionThe results of the present study show that a five week training intervention consisting of HIIT30 minutes three times/week or low intensity walks 60 minutes/week without foodadjustments does not affect the body composition in overweight adults.

  • 20.
    Björner, Elin
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Stjernqvist, Hanna
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Musik – en outnyttjad resurs inom hälsofrämjande arbete: Musikens potential att understödja arbetsmetoden FaR®2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background: The inactivity in society contributes to increased illness and so-called lifestyle- and welfare diseases which can lead to overweight, obesity and premature death. Objective: The aim of this study is to evaluate whether music can act as a motivator and work as an effective support to the physical activity referral (PaR®) Method: Literature study with systematic analysis. Results: PaR® is a work method within the health care system which aims to promote physical activity. The method has potential for development and there is adequate evidence that music can be an effective support to PaR®. We have identified limitations and therefore developed the method by adding music as a motivating component. Conclusion: Music has shown positive qualities in terms of increased motivation and adherence to physical activity. Music has therefore the potential to act as a motivating component in the working method PaR®. Increased adherence to the prescriptions is essential to improve the health for insufficiently active patients. In the long term benefit the public health.

  • 21.
    Blom, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Musikens inverkan på prestationen hos Trumslagare2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose:

    the purpose of this study was to see if the performance in the form of number of arrests of drummers were influenced with the help of music. Since the year 2000 so is it a sport that goes under the epithet" Extreme sport drumming" World’s Fastest Drummer (WFD) where it is at in 1 minute to make as many raids as possible on a snare drum. During these competitions used music as a tool without the participants perform the operation only to the sound that d that they do by the gambling. Method: The Method used in this study is of kvasiexperiment design in which the dependent /independent variable measured. In the study, eight adult professionals entered their experience ranges between 15 and more than 40 years’ total in the exercise of drumming. All participants used the same music where the song was" the Living dead" with Entombed and from the album Clandestine that gave out in 1991. Initially, participants were to perform step 1 without music to in subsections 2 to repeat the procedure again with the music. After completed the test answered the participants on how they experienced the music: Motivating, Annoying, or indifferent. Results: During this study was no significant difference detected between the conditions, some of the participants performed better without music than with. Conclusion: in Order to achieve an adequate effect of the music, so it seems that it has the best effect during the working hours where it then goes to draw the focus towards the music, and thus perform better.

  • 22.
    Boqvist, Maria
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Varkki, Sofia
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Mitt barns fysiska aktivitet: En enkätundersökning om föräldrars inställningar och attityder till sitt barns fysiska aktivitet2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Aim

    The aim of this survey was to examine parents approach and attitude against their children’s physical activity.

    Method

    The survey has been chosen as the method in the study and has been distributed online. The survey has been developed by validated questionnaires and via a newsletter from a school sent to parents whose children are in grade eight. A municipality in central Sweden has been contacted by a convenience sample and then recommended the chosen school. Qualitative data were analyzed using content analysis and in quantitative data the numbers of participants were compiled.

    Result

    Parents mostly believed that their children should be physically active and readily outside organized sports. The results have also shown that parents believe that the school is important in the promotion of varied physical activity.

    Conclusion

    Nine out of ten parents felt that their children should be physically active. The parents felt that children mainly should be active outside of organized sports and made it clear that they are the mainstay when children are active. The parents felt that their children should be introduced to physical activity through the school or by the child’s own interest. Further research should aim to examine what the obstacles and opportunities are in the parents' preferences and attitudes to a child to be physical active. Because of the low number of participants the validity were considered inadequate and the result is only representative of the group that participated.

  • 23.
    Brorsson, Sofia
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    A new grip force measurement device for hand evaluation: comparison between two instruments2013In: Annals of the Rheumatic Diseases, ISSN 0003-4967, E-ISSN 1468-2060, Vol. 72, no s3, 1083-1084 p.Article in journal (Other academic)
  • 24.
    Brorsson, Sofia
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Thorstensson, C.
    Nilsdotter, A.
    Bremander, A.
    Two different sets of hand exercises: improved grip strength after eight weeks in patients with arthritis2014In: Annals of the Rheumatic Diseases, ISSN 0003-4967, E-ISSN 1468-2060, Vol. 73, no s2, 1210-1210 p.Article in journal (Other academic)
  • 25.
    Brändström, Sara
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Olika chans beroende på födelsemånad: En kvantitativ undersökning av relative age effect på svenska längdskidgymnasier2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Aim

    The purpose of this study was to investigate if relative age effect occurs at Swedish cross-country ski schools and if there were a differences in the presence among boys and girls, and between Riksidrottsgymnasier (Country-wide sport academy) and Nationell Idrottsutbildning (National sport academy).

    Method

    To answer the aim, statistical data were analyzed using a Pearson Chi2-test. The analysis has been done by examining birth month, sex and education among students at Swedish cross-country ski schools between 2010-2015.

    Results

    The result shows that there is a significant evidence of relative age effect at Swedish cross-country ski schools (p= <0,05). When the results were partial between Riksidrottsgymnasier and Nationell Idrottsutbildning, the relative age effect was only seen at Riksidrottsgymnasierna. There were no significant evidence for relative age effect when boys and girls where analyzed separately.

    Conclusion

    The results show that relative age effect appears on Swedish cross-country ski schools; however, there were some varies between analyzed variables. Strongest evidence for relative age effect was seen at Riksidrottsgymnaiserna.

    Further research is needed to get a overview of the consequences of relative age effect at cross-country ski schools, and the consequences it has in Swedish cross-country skiing overall, both for younger and older skiers.

  • 26.
    Bäckfors, Rhonja
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Niebl, Viktoria
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Hur kan en personlig tränare påverka motivationen till regelbunden träning? Utifrån kunders och personliga tränares uppfattningar2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Introduction: During the last decade, demand for personal trainers increased when individuals need help with motivation in physical activity. If the personal trainer can adapt the training cabinet after the individual needs it can strengthen the clients motivation to exercise regularly.

    Purpose: The purpose of the study was to compare how the client and the trainer understand what motivates regular exercise. What are the similarities and differences between how personal trainers motivate and how the customer experiences the motivation of the coach?

    Method: The study was based on a qualitative method approach, using the interview as a data collection method. Five individuals were interviewed in total: three personal trainers employed by Gym X and two clients who trained in Gym X with a personal trainer. The material was analyzed with the inspiration of the IPA (interpretative phenomenological analysis).

    Results: The results showed that individuals' motivation to train regularly (and how they were motivated during exercise) was individually to them. Both clients and personal trainers felt that the trainer’s personality, knowledge and flexibility in the role were influencing factors in maintaining the motivation to exercise regularly.

    Conclusion: The result could be linked to previous research in motivation, in which the authors interpret many of the informants' answers as motivators. It is important for trainers to think about their work, able to detect people, be involved and adapt training based on clients needs and desires, otherwise it could lead to the clients choosing to end their cooperation with the trainer when they does not get enough motivation.

  • 27. Cardinale, Daniele
    et al.
    Cardinale, Marco
    Nilsson, Johnny
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Comparison between single and combined data collection methods in loaded squat jump power output2017In: Gazzetta Medica Italiana, ISSN 0393-3660, E-ISSN 1827-1812, Vol. 176, no 6, 315-321 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: The aim of this study was to compare linear position transducer force plate-based methods and more complex combinations of those for calculation of power output in loaded squat jump.

    METHODS: Eight methods were used simultaneously in data collection: vertical ground reaction force (VGRF), ground reaction forces (GRF), 1 linear position transducer (1LPT), 1LPT and VGRF (1LPT+VGRF), 2 linear position transducers (2LPTs), 2LPTs and VGRF (2LPTs+VGRF), 5 linear position transducers (5LPTs), 5LPTs and GRF (5LPTs+GRF). Power output was calculated for each lift according to the sensor or sensors used and the results were compared.

    RESULTS: Power output calculated separately with LPTs and GRF method did not differ significantly from combined methods such as 1LPT+VGRF, 2LPTs+VGRF. No significant differences were found when comparing power output between 5LPTs+GRF and combined methods such as 2LPTs+VGRF.

    CONCLUSIONS: This study indicates that test methodology with a simple single linear position transducer setup and or force platform suffice when recording vertical jump such as loaded squat jump.

  • 28.
    Carlsson, Daniel
    Dalarna University, School of Education, Health and Social Studies.
    Uppmärksamhetsfokus. En studie som undersöker om fotbollstränare i Dalarna ger verbal feedback som är riktad mot antingen internt eller externt uppmärksamhetsfokus2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 29.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Elitlängdskidåkningens fysiologiska krav2016In: Svensk idrottsmedicin, ISSN 1103-7652, Vol. 35, no 1, 22-24 p.Article in journal (Other academic)
  • 30.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Umeå universitet, Idrottsmedicin.
    Physiological demands of competitive elite cross-country skiing2015Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Introduction Researchers have, for decades, contributed to an increased collective understanding of the physiological demands in cross-country skiing; however, almost all of these studies have used either non-elite subjects and/or performances that emulate cross-country skiing. To establish the physiological demands of cross-country skiing, it is important to relate the investigated physiological variables to the competitive performance of elite skiers. The overall aim of this doctoral thesis was, therefore, to investigate the external validity of physiological test variables to determine the physiological demands in competitive elite cross-country skiing.

    Methods The subjects in Study I – IV were elite male (I – III) and female (III – IV) cross-country skiers. In all studies, the relationship between test variables (general and ski-specific) and competitive performances (i.e. the results from competitions or the overall ski-ranking points of the International Ski Federation (FIS) for sprint (FISsprint) and distance (FISdist) races) were analysed. Test variables reflecting the subject’s general strength, upper-body and whole-body oxygen uptake, oxygen uptake and work intensity at the lactate threshold, mean upper-body power, lean mass, and maximal double-poling speed were investigated.

    Results The ability to maintain a high work rate without accumulating lactate is an indicator of distance performance, independent of sex (I, IV). Independent of sex, high oxygen uptake in whole-body and upper-body exercise was important for both sprint (II, IV) and distance (I, IV) performance. The maximal double-poling speed and 60-s double-poling mean power output were indicators of sprint (IV) and distance performance (I), respectively. Lean mass was correlated with distance performance for women (III), whereas correlations were found between lean mass and sprint performance among both male and female skiers (III). Moreover, no correlations between distance performance and test variables were derived from tests of knee-extension peak torque, vertical jumps, or double poling on a ski-ergometer with 20-s and 360-s durations (I), whereas gross efficiency while treadmill roller skiing showed no correlation with either distance or sprint performance in cross-country skiing (IV).

    Conclusion The results in this thesis show that, depending on discipline and sex, maximal and peak oxygen uptake, work intensity at the lactate threshold, lean mass, double-poling mean power output, and double-poling maximal speed are all externally valid physiological test variables for evaluation of performance capability among elite cross-country skiers; however, to optimally indicate performance capability different test-variable expressions should be used; in general, the absolute expression appears to be a better indicator of competitive sprint performance whereas the influence of body mass should be considered when evaluating competitive distance performance capability of elite cross-country skiers.

  • 31.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Assarsson, Hannes
    Dalarna University.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    The influence of sex, age, and race experience on pacing profiles during the 90 km Vasaloppet ski race2016In: Open Access Journal of Sports Medicine, ISSN 1179-1543, E-ISSN 1179-1543, Vol. 7, 11-19 p.Article in journal (Refereed)
    Abstract [en]

    The purpose of this study was to investigate pacing-profile differences during the 90 km Vasaloppet ski race related to the categories of sex, age, and race experience. Skiing times from eight sections (S1 to S8) were analyzed. For each of the three categories, 400 pairs of skiers were matched to have a finish time within 60 seconds, the same start group, and an assignment to the same group for the other two categories. Paired-samples Student’s t-tests were used to investigate sectional pacing-profile differences between the subgroups. Results showed that males skied faster in S2 (P=0.0042), S3 (P=0.0049), S4 (P=0.010), and S1–S4 (P<0.001), whereas females skied faster in S6 (P<0.001), S7 (P<0.001), S8 (P=0.0088), and S5–S8 (P<0.001). For the age category, old subjects (40 to 59 years) skied faster than young subjects (19 to 39 years) in S3 (P=0.0029), and for the other sections, there were no differences. Experienced subjects (≥4 Vasaloppet ski race completions) skied faster in S1 (P<0.001) and S1–S4 (P=0.0054); inexperienced skiers (<4 Vasaloppet ski race completions) had a shorter mean skiing time in S5–S8 (P=0.0063). In conclusion, females had a more even pacing profile than that of males with the same finish time, start group, age, and race experience. No clear age-related pacing-profile difference was identified for the matched subgroups. Moreover, experienced skiers skied faster in the first half whereas inexperienced skiers had higher skiing speeds during the second half of the race.

  • 32.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Carlsson, Tomas
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Styrketräning för äldre: mirakelkur för individen, familjen och samhället?2008In: Svensk idrottsmedicin, ISSN 1103-7652, Vol. 27, no 1, 14-19 p.Article in journal (Other academic)
  • 33.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Granath, Johan
    Regional Sports Federation of Dalarna.
    Westergren, Jens
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Malm, Christer
    Idrottsmedicin, Umeå Universitet.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Validation of off-season physiological tests with ski ranking in elite male junior cross-country skiing2012In: Book of Abstract: Supplement to Medicine and Science in Sports and Exercise, Volume 44, Number 5, May 2012, 2012, 353-353 p.Conference paper (Refereed)
  • 34.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Granath, Johan
    Westergren, Jens
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Malm, Christer
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Validation of off-season physiological tests with ski ranking in elite male junior cross-country skiing2012In: Medicine & Science in Sports & Exercise, ISSN 0195-9131, E-ISSN 1530-0315, Vol. 44, no s2, 516-516 p.Article in journal (Other academic)
  • 35.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Sports Medicine Unit, Umeå University, Umeå, Sweden, Dala Sports Academy, Falun, Sweden.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Sports Medicine Unit, Umeå University, Umeå, Sweden, Dala Sports Academy, Falun, Sweden.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Lillehammer University College, Lillehammer, Norway.
    Malm, Christer
    Sports Medicine Unit, Umeå University, Umeå, Sweden.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Prediction of race performance of elite cross-country skiers by lean mass2014In: International Journal of Sports Physiology and Performance, ISSN 1555-0265, Vol. 9, no 6, 1040-1045 p.Article in journal (Refereed)
    Abstract [en]

    Purpose: To investigate the relationship between race performance and lean mass (LM) variables, as well as to examine sex differences in body composition in elite-standard cross-country skiers. 

    Methods: Thirty-four elite cross-country skiers (18 men and 16 women) underwent a dual-emission x-ray absorptiometry body composition test to determine LM, fat mass, and bone mineral content. For both sexes, performance data were collected from a sprint prologue and a distance race. 

    Results: The absolute expression of LM variables [whole body (LMWB), upper body (LMUB), and lower body (LMLB)] was significantly correlated with finishing time in the sprint prologue independent of sex. Distance-race performance was significantly related to LMWB, LMUB, and LMLB in women; however, no correlation was found in men. Men had a significantly higher LM and lower fat mass, independent of expression (absolute or relative), for the whole body, arms, trunk, and legs, except for the absolute fat mass in the trunk. 

    Conclusions: The absolute expressions of LMWB, LMUB, and LMLB were significant predictors of sprint-prologue performance in both sexes, as well as of distance-race performance in women only. Compared with women, male skiers have a higher LM in the body segments that are major contributors to propelling forces. These results suggest that muscle mass in the lower and upper body is equally important for race performance; thus, more focus of elite skiers’ training should be directed to increasing whole-body muscle mass to improve their competitive performance capability.

  • 36.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Tiivel, Toomas
    Malm, Christer
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Validation of physiological tests in relation to competitive performances in elite male distance cross-country skiing2012In: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 26, no 6, 1496-1504 p.Article in journal (Refereed)
    Abstract [en]

    The purpose of the present study was to establish which physiological test parameters reflects the distance performances in the Swedish National Championships in cross-country skiing (SNC) and the International Ski Federation's ranking points for distance performances (FISdist). The present study also aimed to create multiple regression models to describe skiing performance for the SNC distance races and International Ski Federation's (FIS) ranking. Twelve male, Swedish, national elite, cross-country skiers (maximal oxygen consumption [(V) over dotO(2)max] = 5.34 +/- 0.34 L.min(-1)) volunteered to participate in the study. Their results in the 2008 SNC (15 km race [SNC15] and 30 km race [SNC30]) and FISdist points were used as performance data. On the week preceding the Championship, subjects completed a test battery consisting of 7 physiological tests: isokinetic knee extension peak torque (PT), vertical jumps (VJ), lactate threshold (LT), (V) over dotO(2)max, and 3 double poling tests of different durations (DP20, DP60, and DP360). Correlations were established using Pearson's correlation analysis, and models to describe skiing performance were created using standard multiple linear regression analysis. Significant correlations were found between the performance parameters and test parameters derived from LT, (V) over dotO(2)max, and DP60 tests. No correlations with any performance parameter were found for PT, VJ, DP20, and DP360 tests. For FISdist and SNC15, the models explain 81% and 78% of the variance in performance, respectively. No statistically valid regression model was found for SNC30. The results of this study imply that the physiological demands in male elite distance cross-country skiing performances are different in different events. To adequately evaluate a skier's performance ability in distance cross-country skiing, it is necessary to use test parameters and regression models that reflect the specific performance.

  • 37.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Sports Medicine Unit, Umeå University, Umeå, Sweden; Dala Sports Academy, Falun, Sweden.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Sports Medicine Unit, Umeå University, Umeå, Sweden; Dala Sports Academy, Falun, Sweden.
    Knutsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Dala Sports Academy, Falun, Sweden.
    Malm, Christer
    Sports Medicine Unit, Umeå University, Umeå, Sweden; Winternet, Boden, Sweden .
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Oxygen uptake at different intensities and sub‑techniques predicts sprint performance in elite male cross‑country skiers2014In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 114, no 12, 2587-2595 p.Article in journal (Refereed)
    Abstract [en]

    Purpose. To investigate the relationship between sprint-prologue performance (using the classical technique) and the oxygen uptake at the lactate threshold ( V˙O2obla), maximal oxygen uptake ( V˙O 2max), and mean oxygen uptake during double poling ( V˙O 2dp).

    Methods. Eight elite male cross-country skiers [age 24.8 ± 4.8 years, (mean ± SD)] completed two treadmill roller-skiing tests using the diagonal-stride technique and a 60 s double-poling test on a ski-ergometer to determine their V˙O2obla, V˙O 2max, and V˙O 2dp. Performance data were generated from a 1.25 km sprint prologue. Power-function modelling was used to predict the skiers’ race speeds based on the oxygen-uptake variables and body mass.

    Results. There were correlations between the race speed and the absolute expression of the V˙O2obla (r = 0.79, P = 0.021), V˙O 2max (r = 0.86, P = 0.0069), and V˙O 2dp (r = 0.94, P = 0.00062). The following power-function models were established for race-speed prediction: 1.09 · V˙O 2obla0.21, 1.05 · V˙O 2max0.21, and 1.19 · V˙O 2dp0.20; these models explained 60 % (P = 0.024), 73 % (P = 0.0073), and 87 % (P = 0.00073), respectively, of the variance in the race speed. However, body mass did not contribute to any of the models (P = 0.97, 0.88, and 0.21, respectively).

    Conclusions. Oxygen uptake at different intensities and sub-techniques is an indicator of elite male sprint-prologue performance. The absolute expression of the investigated oxygen-uptake variables should be used when evaluating elite male sprint-prologue performances; if skiers oxygen uptake differs by 1 %, their performances will likely differ by 0.2 % in favour of the skier with higher oxygen uptake.

  • 38.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Olsson, Mats
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Brorsson, Sofia
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Malm, Christer
    Idrottsmedicin, Umeå Universitet.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Peak hand-grip force predicts competitive performance in elite female cross-country skiers2014Conference paper (Refereed)
  • 39.
    Carlsson, Magnus
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Umeå universitet; Dala Sports Academy.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Umeå universitet; Dala Sports Academy.
    Wedholm, Lars
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Dala Sports Academy.
    Nilsson, Mattias
    Regional Sports Federation of Dalarna.
    Malm, Christer
    Idrottsmedicin, Umeå Universitet.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Physiological demands of competitive sprint and distance performance in elite female cross-country skiing2016In: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 30, no 8, 2138-2144 p.Article in journal (Refereed)
    Abstract [en]

    The purpose was to investigate the relationship between elite females' competitive performance capability in sprint and distance cross-country skiing and the variables of gross efficiency (GE), work rate at the onset of blood-lactate accumulation (OBLA4mmol), maximal oxygen uptake (VO2max), maximal speed (Vmax), and peak upper-body oxygen uptake (VO2peak). Ten elite female cross-country skiers (age 24.5 ± 2.8 years) completed treadmill roller-skiing tests to determine GE, OBLA4mmol, and VO2max using the diagonal-stride technique as well as Vmax and VO2peak using the double-poling technique. International Ski Federations ranking points for sprint (FISsprint) and distance (FISdist) races were used as competitive performance data. There were correlations between the FISsprint and the VO2max expressed absolutely (P = 0.0040), Vmax (P = 0.012), and VO2peak expressed absolutely (P < 0.001) and as a simple ratio-standard (P = 0.049). The FISdist were correlated with OBLA4mmol (P = 0.048), VO2max expressed absolutely (L·min) (P = 0.015) and as a simple ratio-standard (P = 0.046), and VO2peak expressed absolutely (P = 0.036) and as a simple ratio-standard (mL·min·kg) (P = 0.040). The results demonstrate that the physiological abilities reflected by VO2max and VO2peak are indicators of competitive sprint and distance performance in elite female cross-country skiing. In addition, the ability to generate a high Vmax indicates the performance in sprint races whereas the skier's OBLA4mmol reflects the performance capability in distance races. Based on the results, when evaluating the performance capacity of elite female cross-country skiers, it is recommended to use physiological variables that reflect competitive performance.

  • 40.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Betydelse av syreupptag och kroppsmassa för prestation i längdskidåkning2016In: Svensk idrottsmedicin, ISSN 1103-7652, Vol. 35, no 1, 25-27 p.Article in journal (Other academic)
  • 41.
    Carlsson, Tomas
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Umeå universitet.
    The importance of body-mass exponent optimization for evaluation of performance capability in cross-country skiing2015Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Introduction Performance in cross-country skiing is influenced by the skier’s ability to continuously produce propelling forces and force magnitude in relation to the net external forces. A surrogate indicator of the “power supply” in cross-country skiing would be a physiological variable that reflects an important performance-related capability, whereas the body mass itself is an indicator of the “power demand” experienced by the skier. To adequately evaluate an elite skier’s performance capability, it is essential to establish the optimal ratio between the physiological variable and body mass. The overall aim of this doctoral thesis was to investigate the importance of body-mass exponent optimization for the evaluation of performance capability in cross-country skiing.

    Methods In total, 83 elite cross-country skiers (56 men and 27 women) volunteered to participate in the four studies. The physiological variables of maximal oxygen uptake (V̇O2max) and oxygen uptake corresponding to a blood-lactate concentration of 4 mmol∙l-1 (V̇O2obla) were determined while treadmill roller skiing using the diagonal-stride technique; mean oxygen uptake (V̇O2dp) and upper-body power output () were determined during double-poling tests using a ski-ergometer. Competitive performance data for elite male skiers were collected from two 15-km classical-technique skiing competitions and a 1.25-km sprint prologue; additionally, a 2-km double-poling roller-skiing time trial using the double-poling technique was used as an indicator of upper-body performance capability among elite male and female junior skiers. Power-function modelling was used to explain the race and time-trial speeds based on the physiological variables and body mass.

    Results The optimal V̇O2max-to-mass ratios to explain 15-km race speed were V̇O2max divided by body mass raised to the 0.48 and 0.53 power, and these models explained 68% and 69% of the variance in mean skiing speed, respectively; moreover, the 95% confidence intervals (CI) for the body-mass exponents did not include either 0 or 1. For the modelling of race speed in the sprint prologue, body mass failed to contribute to the models based on V̇O2max, V̇O2obla, and V̇O2dp. The upper-body power output-to-body mass ratio that optimally explained time-trial speed was m-0.57 and the model explained 63% of the variance in speed.

    Conclusions The results in this thesis suggest that V̇O2max divided by the square root of body mass should be used as an indicator of performance in 15-km classical-technique races among elite male skiers rather than the absolute or simple ratio-standard scaled expression. To optimally explain an elite male skier’s performance capability in sprint prologues, power-function models based on oxygen-uptake variables expressed absolutely are recommended. Moreover, to evaluate elite junior skiers’ performance capabilities in 2-km double-poling roller-skiing time trials, it is recommended that divided by the square root of body mass should be used rather than absolute or simple ratio-standard scaled expression of power output.

  • 42.
    Carlsson, Tomas
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Felleki, Majbritt
    Dalarna University, School of Technology and Business Studies, Statistics.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Heil, Daniel
    Montana State University.
    Malm, Christer
    Umeå Universitet, Idrottsmedicin.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Scaling maximal oxygen uptake to predict performance in elite-standard men cross-country skiers2013In: Journal of Sports Sciences, ISSN 0264-0414, E-ISSN 1466-447X, Vol. 31, no 16, 1753-1760 p.Article in journal (Refereed)
    Abstract [en]

    The purpose of this study was to: 1) establish the optimal body-mass exponent for maximal oxygen uptake (O2max) to indicate performance in elite-standard men cross-country skiers; and 2) evaluate the influence of course inclination on the body-mass exponent. Twelve elite-standard men skiers completed an incremental treadmill roller-skiing test to determine O2max and performance data came from the 2008 Swedish National Championship 15-km classic-technique race. Log-transformation of power-function models was used to predict skiing speeds. The optimal models were found to be: Race speed = 7.86 · O2max · m −0.48 and Section speed = 5.96 · O2max · m −(0.38 + 0.03 · α) · e−0.003 · Δ (where m is body mass, α is the section's inclination and Δ is the altitude difference of the previous section), that explained 68% and 84% of the variance in skiing speed, respectively. A body-mass exponent of 0.48 (95% confidence interval: 0.19 to 0.77) best described O2max as an indicator of performance in elite-standard men skiers. The confidence interval did not support the use of either “1” (simple ratio-standard scaled) or “0” (absolute expression) as body-mass exponents for expressing O2max as an indicator of performance. Moreover, results suggest that course inclination increases the body-mass exponent for O2max.

  • 43.
    Carlsson, Tomas
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Malm, Christer
    Umeå Universitet, Idrottsmedicin.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Scaling of upper-body power output to predict time-trial roller skiing performance2013In: Journal of Sports Sciences, ISSN 0264-0414, E-ISSN 1466-447X, Vol. 31, no 6, 582-588 p.Article in journal (Refereed)
    Abstract [en]

    The purpose of the present study was to establish the most appropriate allometric model to predict mean skiing speed during a double-poling roller skiing time-trial using scaling of upper-body power output. Forty-five Swedish junior cross-country skiers (27 men and 18 women) of national and international standard were examined. The skiers, who had a body mass (m) of 69.3 ± 8.0 kg (mean ± s), completed a 120-s double-poling test on a ski ergometer to determine their mean upper-body power output (W). Performance data were subsequently obtained from a 2-km time-trial, using the double-poling technique, to establish mean roller skiing speed. A proportional allometric model was used to predict skiing speed. The optimal model was found to be: Skiing speed = 1.057 · W 0.556 · m −0.315, which explained 58.8% of the variance in mean skiing speed (P < 0.001). The 95% confidence intervals for the scaling factors ranged from 0.391 to 0.721 for W and from −0.626 to −0.004 for m. The results in this study suggest that allometric scaling of upper-body power output is preferable for the prediction of performance of junior cross-country skiers rather than absolute expression or simple ratio-standard scaling of upper-body power output.

  • 44.
    Carlsson, Tomas
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Umeå universitet.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science. Umeå universitet.
    Hammarström, Daniel
    Lillehammer University College.
    Rønnestad, Bent R
    Lillehammer University College.
    Malm, Christer
    Umeå Universitet, Idrottsmedicin.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Optimal V. O2max-to-mass ratio for predicting 15 km performance among elite male cross-country skiers2015In: Open Access Journal of Sports Medicine, ISSN 1179-1543, E-ISSN 1179-1543, Vol. 6, 353-360 p.Article in journal (Refereed)
    Abstract [en]

    The aim of this study was 1) to validate the 0.5 body-mass exponent for maximal oxygen uptake (V. O2max) as the optimal predictor of performance in a 15 km classical-technique skiing competition among elite male cross-country skiers and 2) to evaluate the influence of distance covered on the body-mass exponent for V. O2max among elite male skiers. Twenty-four elite male skiers (age: 21.4±3.3 years [mean ± standard deviation]) completed an incremental treadmill roller-skiing test to determine their V. O2max. Performance data were collected from a 15 km classicaltechnique cross-country skiing competition performed on a 5 km course. Power-function modeling (ie, an allometric scaling approach) was used to establish the optimal body-mass exponent for V . O2max to predict the skiing performance. The optimal power-function models were found to be race speed = 8.83⋅(V . O2max m-0.53) 0.66 and lap speed = 5.89⋅(V . O2max m-(0.49+0.018lap)) 0.43e0.010age, which explained 69% and 81% of the variance in skiing speed, respectively. All the variables contributed to the models. Based on the validation results, it may be recommended that V. O2max divided by the square root of body mass (mL⋅min−1 ⋅kg−0.5) should be used when elite male skiers’ performance capability in 15 km classical-technique races is evaluated. Moreover, the body-mass exponent for V . O2max was demonstrated to be influenced by the distance covered, indicating that heavier skiers have a more pronounced positive pacing profile (ie, race speed gradually decreasing throughout the race) compared to that of lighter skiers.

  • 45.
    Carlsson, Tomas
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Scaling oxygen consumption to body mass in real elite cross-country skiing performances2009In: Book of Abstracts: Sport sciences: Nature, Nurture and Culture / [ed] Loland, S., et al., 2009, 351-352 p.Conference paper (Refereed)
    Abstract [en]

    Introduction: Which are the main physiological differences between a successful and less successful cross-country skier? To our knowledgeno previous studies have examined a real elite cross-country ski competition. Main purpose of this study was therefore to validatecommonly used test parameters to skiing time and to International Ski Federation (FIS) overall seasonal ranking points and to createmultiple regression models to predict skiing performances.Methods: Twelve highly motivated male Swedish national elite cross-country skiers completed a test battery consisting of: isokinetic kneeextensor peak torque tests at three different velocities; three different vertical jumps tests; two-part treadmill roller skiing test determininglactate markers, maximal oxygen consumption (VO2max) and time to exhaustion; 60 and 360 s double poling tests determining meanupper-body power (DP60Pmean) (DP360Pmean) and mean oxygen consumption (DP60VO2mean) (DP360VO2mean).Performance data were collected from the Swedish National Championship (SNC) in cross-country skiing (13-17 March 2008): 15-km withindividual start in classical technique (SNC15); 30-km double pursuit with mass-start (SNC30); sprint prolog in free-style technique(SNCsprint). In addition to ski races, overall seasonal ski ranking points were collected from FIS 3rd Cross-Country Points List 2007/2008published before SNC for distance (FISdist) and sprint (FISsprint) races.Correlations between test parameters and performance data were established using Pearson´s correlation analysis. Prediction modelswere created using standard multiple linear regression analysis.Results: Time to exhaustion during the incremental treadmill roller ski test is best correlated with both SNC15 (r = -0.86, p < 0.001) andSNC30 (r = -0.81, p < 0.01). For SNC15 significant correlations were shown with VO2max both absolute and relative to body weight, lactatemarkers, DP60Pmean and DP60VO2mean. Corresponding correlations for SNC30 were: lactate markers, DP60VO2mean and percentagedecrease in mean knee extension peak torque when comparing highest and lowest velocities. Highest correlation coefficient forSNCsprint was found for DP60Pmean (r = -0.93, p < 0.05). Significant correlations for SNCsprint was also detected for DP360Pmean aswell as DP360VO2mean and jump height in squat jump.Prediction models explain 68, 91, 68, 77 and 82% of the variance in performance for SNC15, SNC30, SNCsprint, FISdist and FISsprint,respectively.Discussion: Correlations found in this study have validated several commonly used physiological tests with real elite cross-country skiingperformances. Frequently investigated test parameters like VO2max and anaerobic thresholds are of great importance for success incross-country skiing. Many recent research studies have focused on upper-body capacity and we could confirm that high mean powerproduction in double poling is necessary to be successful as elite skier in both sprint and distance races.

  • 46.
    Carlsson, Tomas
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Rønnestad, Bent
    Lillehammer University College.
    Hammarström, Daniel
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Malm, Christer
    Umeå Universitet, Idrottsmedicin.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    The importance of scaling VO2MAX to predict cross-country skiing performance2013Conference paper (Refereed)
    Abstract [en]

    Introduction A high maximal oxygen uptake (VO2max) is of importance for success in elite male competitive distance cross-country skiing (Carlsson et al. 2012). However, it is still debatable how VO2max should be expressed to best indicate skiing performance. Therefore, the purpose of this study was to establish the optimal body mass exponent for VO2max to indicate performance in elite-standard male cross-country skiers. Methods Twenty-four elite-standard male cross-country skiers completed an incremental treadmill roller skiing test in diagonal stride technique determining VO2max. Performance data was compiled from a 15-km classic technique race. To predict performance a log-transformation of power-function model: Race speed = β0 • VO2max^β1 • m^β2 was used, where β0 to β2 are constants, and m is body mass. Statistical analyses used R version 2.13.2 (R Development Core Team, New Zeeland) and alpha was 0.05. Results Participants’ VO2max was 5.39 ± 0.57 l/min (mean ± s) and m was 75.5 ± 6.3 kg. Mean race speed was 5.83 ± 0.41 m/s. The model that best predicted performance was: Race speed = 8.829 • VO2max^0.663 • m^-0.355 = 8.829 • (VO2max • m^–0.535 )^0.663, that explains 69.2% of the variance in race speed for the 15-km classic technique race (P < 0.001). For the VO2max-to-mass ratio within the model, the 95% confidence interval (CI) for the body-mass exponent ranged from -0.947 to -0.122. Discussion The optimal body mass exponent for VO2max to indicate performance in elite-standard male cross-country skiers was -0.535. Moreover, the CI for the body-mass exponent does not support the use of simple ratio-standard scaling and absolute expression of VO2max as indicators of 15 km classic ski racing performance in elite-standard men skiers. 

  • 47.
    Carlsson, Tomas
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Aerobic power and lean mass are indicators of competitive sprint performance among elite female cross-country skiers2016In: Open Access Journal of Sports Medicine, ISSN 1179-1543, E-ISSN 1179-1543, Vol. 7, 153-160 p.Article in journal (Refereed)
    Abstract [en]

    The purpose of this study was to establish the optimal allometric models to predict International Ski Federation’s ski-ranking points for sprint competitions (FISsprint) among elite female cross-country skiers based on maximal oxygen uptake (V̇O2max) and lean mass (LM). Ten elite female cross-country skiers (age: 24.5±2.8 years [mean ± SD]) completed a treadmill roller-skiing test to determine V̇O2max (ie, aerobic power) using the diagonal stride technique, whereas LM (ie, a surrogate indicator of anaerobic capacity) was determined by dual-emission X-ray anthropometry. The subjects’ FISsprint were used as competitive performance measures. Power function modeling was used to predict the skiers’ FISsprint based on V̇O2max, LM, and body mass. The subjects’ test and performance data were as follows: V̇O2max, 4.0±0.3 L min-1; LM, 48.9±4.4 kg; body mass, 64.0±5.2 kg; and FISsprint, 116.4±59.6 points. The following power function models were established for the prediction of FISsprint: 3.91×105 ∙ VO -6.002maxand 6.95×1010 ∙ LM-5.25; these models explained 66% (P=0.0043) and 52% (P=0.019), respectively, of the variance in the FISsprint. Body mass failed to contribute to both models; hence, the models are based on V̇O2max and LM expressed absolutely. The results demonstrate that the physiological variables that reflect aerobic power and anaerobic capacity are important indicators of competitive sprint performance among elite female skiers. To accurately indicate performance capability among elite female skiers, the presented power function models should be used. Skiers whose V̇O2max differs by 1% will differ in their FISsprint by 5.8%, whereas the corresponding 1% difference in LM is related to an FISsprint difference of 5.1%, where both differences are in favor of the skier with higher V̇O2max or LM. It is recommended that coaches use the absolute expression of these variables to monitor skiers’ performance-related training adaptations linked to changes in aerobic power and anaerobic capacity.

  • 48.
    Carlsson, Tomas
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Wedholm, Lars
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Nilsson, Johnny
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Carlsson, Magnus
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    The effects of strength training versus ski-ergometer training on double-poling capacity of elite junior cross-country skiers2017In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 117, no 8, 1523-1532 p.Article in journal (Refereed)
    Abstract [en]

    Purpose

    To compare the effects of strength training versus ski-ergometer training on double-poling gross efficiency (GE), maximal speed (Vmax), peak oxygen uptake (V&#x02D9;O2peak" role="presentation" style="box-sizing: border-box; display: inline-table; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">V˙O2peakV˙O2peak) for elite male and female junior cross-country skiers.

    Methods

    Thirty-three elite junior cross-country skiers completed a 6-week training-intervention period with two additional 40-min training sessions per week. The participants were matched in pairs and within each pair randomly assigned to either a strength-training group (STR) or a ski-ergometer-training group (ERG). Before and after the intervention, the participants completed three treadmill roller-skiing tests to determine GE, Vmax, and V&#x02D9;O2peak" role="presentation" style="box-sizing: border-box; display: inline-table; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">V˙O2peakV˙O2peak. Mixed between-within subjects analysis of variance (ANOVA) was conducted to evaluate differences between and within groups. Paired samples t tests were used as post hoc tests to investigate within-group differences.

    Results

    Both groups improved their Vmax and V&#x02D9;O2peak" role="presentation" style="box-sizing: border-box; display: inline-table; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">V˙O2peakV˙O2peak expressed absolutely (all P < 0.01). For the gender-specific sub-groups, it was found that the female skiers in both groups improved both Vmax and V&#x02D9;O2peak" role="presentation" style="box-sizing: border-box; display: inline-table; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">V˙O2peakV˙O2peak expressed absolutely (all P < 0.05), whereas the only within-group differences found for the men were improvements of Vmax in the STR group. No between-group differences were found for any of the investigated variables.

    Conclusions

    Physiological and performance-related variables of importance for skiers were improved for both training regimes. The results demonstrate that the female skiers’ physiological adaptations to training, in general, were greater than those of the men. The magnitude of the physiological adaptations was similar for both training regimes.

  • 49.
    Clazon, Carl
    et al.
    Dalarna University, School of Education, Health and Social Studies.
    Näslund, Fredrik
    Dalarna University, School of Education, Health and Social Studies.
    Handdominans inom ishockey och dess relation till poängproduktionen inom Elitserien2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 50.
    Dahlberg, Tom
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Kroppsideal via Instagram2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Objective

    The advanced technology of today’s society has brought on a heavy uprising of social media where images of training and bodies are a common phenomenon. The aim of this study was to examine how body ideals are created on the internet, with focus on social media. Two questions were used to help with this objective: How do male fitness profiles portrait themselves and their bodies on the net based service Instagram? Do connections exist between these profiles portraits of the body and specific body ideologies? (Rosenmann & Kaplan, 2014).

    Method

    The study was carried out with a nethnographic method, a method specifically focused on qualitative research regarding the internet. Three male fitness profiles and five of their images each were selected based on popularity on Instagram to be examined and analyzed in relation to body ideal.

    Results

    The images had similar attributes which included that they, often in a gym environment, showed undressed, extremely muscular bodies with emphasized focus on the upper body. Differences were present in the images but not to any significant extent. The profiles were defined by the body ideology of metrosexuality and consumer masculinity (Rosenmann & Kaplan, 2014).

    Conclusion

    The representation of the images of these fitness profiles translate well into the current muscular body ideal that contains a lean, muscular, well defined body. Clear connections could be made to Rosenmann’s och Kaplan’s (2014) body ideology of metrosexuality and consumer masculinity.

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