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  • 201.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Det viktigaste du behöver veta om styrketräning för barn2020In: Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN 1103-4629Article in journal (Other academic)
  • 202.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Hur många stulna medaljer?2012In: Idrott och Kunskap, ISSN 1652-6961, no 4, p. 58-59Article in journal (Other (popular science, discussion, etc.))
  • 203.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Idrottsmedicinen sviker barnen2012In: Svenska Dagbladet, ISSN 1101-2412, no 25 nov, p. 5-5Article in journal (Other (popular science, discussion, etc.))
  • 204.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Mest är inte alltid bäst2011In: Idrott och Kunskap, ISSN 1652-6961, no 3, p. 56-57Article in journal (Other (popular science, discussion, etc.))
  • 205.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Om korta, tydliga råd och sammanfattningsrutor…2012In: Idrott och Kunskap, ISSN 1652-6961, no 3, p. 54-55Article in journal (Other (popular science, discussion, etc.))
  • 206.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Statisk uthållighet i bågskytte2012In: Bågskytten, ISSN 0345-1216, Vol. 65, no 11, p. 18-20Article in journal (Other (popular science, discussion, etc.))
  • 207.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Styrketräning bra för balansen2016In: här&nu, ISSN 1653-2287, no 5, p. 11-11Article in journal (Other (popular science, discussion, etc.))
  • 208.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Styrketräning för unga bågskyttar2016In: Bågskytten, ISSN 0345-1216, Vol. 69, no 7, p. 12-15Article in journal (Other (popular science, discussion, etc.))
  • 209.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Styrketräning är positivt för barns utveckling2012In: Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN 1103-4629, no 2, p. 53-54Article in journal (Other academic)
  • 210.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Träning bra för nära relationer2016In: här&nu, ISSN 1653-2287, no 4, p. 13-13Article in journal (Other (popular science, discussion, etc.))
  • 211.
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Träningslärans grunder - fysiska grundegenskaper och träningsprinciper2018In: Idrottens träning, Stockholm: SISU Idrottsböcker , 2018, p. 22-57Chapter in book (Other academic)
  • 212.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Uthållighetsträning och kolhydrater: det stora missförståndet2012In: Idrott & Kunskap, ISSN 1652-6961, no 5, p. 58-59Article in journal (Other (popular science, discussion, etc.))
  • 213.
    Tonkonogi, Michail
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Är din uppvärmning optimal? 2011In: Idrott och Kunskap, ISSN 1652-6961, no 5, p. 58-59Article in journal (Other (popular science, discussion, etc.))
  • 214.
    Tonkonogi, Michail
    et al.
    Dalarna University, School of Health and Social Studies, Medical Science.
    Bellardini, Helena
    Dalarna University, School of Health and Social Studies, Sport and Health Science.
    Fysisk trening for barn och ungdom: for helse, allsidig utvikling og prestasjon2013 (ed. 1)Book (Other (popular science, discussion, etc.))
  • 215.
    Tonkonogi, Michail
    et al.
    Dalarna University, School of Education, Health and Social Studies, Medical Science.
    Bellardini, Helena
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Träna bort den stressrelaterade ohälsan2016 (ed. 1)Book (Other academic)
  • 216.
    Tonkonogi, Michail
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Bellardini, Helena
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Åldersanpassad fysisk träning för barn och ungdomar2012 (ed. 1)Book (Other academic)
  • 217.
    Tynell, Rikard
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Delkropp- eller helkroppsarbete som återhämtningsstrategi efter upprepade högintensiva arbetsbelastningar på stakergometer hos svenska elitlängdskidåkare.: En kvantitativ studie om återhämtningsstrategier2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The purpose of the study was to investigate the difference between two recovery strategies, lower-body work (cycle) and whole-body work (roller skiing), regarding to power development in repeated maximum workout on double-poling ergometer. Moreover, the study also aims to investigating whether the heart rate and the blood-lactate concentration differ between the recovery strategies.

    Method: Seven elite-active male skiers at national level were recruited to the study where a crossover method was applied. A prologue and three heats with three minutes of high-intensity work were performed during each performance. Recovery strategies were carried out with 16 min work at a workload for ≈ 55% of VO2max. The collected test variables in this study were lactate concentration, effect development, and heart rate.

    Results: A significant difference was found in the lactate concentration after whole-body work as a recovery strategy. However, there was no difference between the strategies in power development during the heats. Furthermore, no difference in heartrates was detected before or during the heats.

    Conclusions: None of the investigated recovery strategies can be recommended above the other in order to optimize the sprint performance in cross-country skiing. However, whole-body work resulted in a lower blood-lactate concentration prior to next heat compared to lower-body work as recovery strategy.

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  • 218.
    van der Maarel, Martin
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Byqvist, Mikael
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Hur parkmiljöer kan påverka vardagsrörelse: en studie utifrån aktiva unga vuxnas uppfattningar2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Reduced movement in everyday life is a problem that is becoming increasingly common in the world today. Although people today are becoming more and more regularly physically active and conduct more planned exercise, the everyday movement that is needed to maintain a good health and reduce the risk of dying prematurely, is decreasing. Something that has been shown to increase everyday activity is the presence of park environments. Research has shown that where fewer parks existed, people were more sedentary and less active. The

    aim of this study was to investigate the relationship between everyday movement and park environments based on the view of physically active young adults. The method used in this study consisted of interviewing young adults (18-30 years of age). Why this selection was used was because this group of age were previously considered to have good health during their period of life, but new evidence shows that people of these ages are becoming increasingly inactive in their daily lives. Physically active people were chosen to see how their perceptions of movement in addition to their normal training meant to them. Six active young adults were recruited to the study and interviewed. The results showed that young adults understand the meaning of the positive effects of movement, but at the same time they were negatively motivated to visit park environments. The single movement in parks indicated by the participants was in the form of walks and jogging. Participants suggested that more types of activities (kiosks, outdoor gyms, etc.) should be available to increase the visitor level in park environments for a longer period of time, as well as conduct more daily living there.

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  • 219.
    Vestergren, Tommy
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Josefsson, Jesper
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Muskelaktivering under farmers walk, marklyft, trapbarmarklyft (high-bar) och trapbar marklyft (low-bar): En Deskriptiv Studie2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    SubjectThe purpose of this descriptive study was to examine the mean muscle activation rate in the exercises farmers walk, conventional deadlifts, trapbar deadlift (high bar) and trapbar deadlift (low bar).MethodsThe participants were five healthy men with no injuries or diseases, with at least two years of prior experience in general strength training and the four specific test exercises; and able to perform at least five repetitions of 150 kilos conventional deadlift. Their average age, height and body weight was 25 ± 4 years, 180 ± 3 cm and 85 ± 4 kg. The EMG-apparatus used in the study was a Biometrics Datalog (Cumfelinfach, Gwent, UK) with associated surface electrodes and knee goniometer. The analysis of the recorded data was done with the software Biometrics DATALOG PC software (v: 7.50). The compilation of all data used Microsoft Excel 2010. The data are presented in mean ± standard deviation in relation to mean maximum voluntary contraction (MVIC). In the study, participants performed a number of pre-tests, for the so called MVIC, which then was used as a normalization of the EMG-data. The main test in the study were four different exercises; conventional deadlift, trapbar deadlift (high bar) and trapbar deadlift (low-bar) and farmers walk. During the test participants used 150 kg for five repetitions on the deadlifts and 150 kg for fifteen meters on the farmers walk.ResultsThe results presented here for the deadlift is in line with previous results presented for various deadlift variations in relation to MVIC for all muscles tested in previous studies. The greatest normalaized mean EMG-activation rate was achieved in the lower body muscles; vastus lateralis, gluteus medius; and the erector spinae muscles. While the torso muscles—with the teres Major muscles as an outliner—was active to a lesser extent. We found similar results with the other two deadlift versions with the trapbar (High and lowbar). Farmers walk showed similir degree of muscle activation in the lower body as the deadlifts, while the exercise showed a higher mean EMG-activation rate of the upper body muscles.ConclusionThe three different deadlift versions have similar activation patterns, while the farmers walk activates the upper body to a greater degree. Each exercise achieves a high degree of mean EMG-activation and can be used to stimulate strength increases, both for muscle-endurance and too some extent maximum strength.

  • 220.
    Vilagi, Christopher
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Munter Ribeiro, Philip
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Självupplevd skadeförekomst vid Crossfitutövning iSverige: En retrospektiv kohortstudie2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Objective

    The objective of this study is to map the self-perceived injury frequency in Swedish Crossfit participants.

    Design

    Retrospective cohort study.

    Method

    An electronic survey was made and distributed in the Facebook group ”CF Sweden”, a group for Swedish Crossfit participants consisting of about 8000 members. The survey identified demographic data, training attributes and injury frequency in Swedish Crossfit participants. To be included in the study the participants had to be >18 years old and had to train at an affiliated Crossfit gym/box.

    Results

    305 individuals answered the survey, of which only 274 were included in the study because they didn’t fulfill the inclusion criteria’s. Of those included 137 (50 %) were men and 137 (50 %) were women, the majority of the participants were in the age category 28-37 years, 89 (32,5 %) followed by the category 38-47 years, 86 (31,4 %) and most participants answered that they had practiced Crossfit for more than 25 months, 162 (59,1%). The results show how 162 (59,1 %) of the participants had injured themself during the last year and that shoulders, 82 (49,1 %) were the body part most likely to get injured during Crossfit, followed by the lower back, 42 (25,1 %) and knees, 34 (20,4 %). The majority of the Crossfit participants answered that they had injured themselves during a WOD, 94 (56,6 %) followed by weightlifting, 51 (30,7 %).

    Conclusion The injury frequency in Crossfit does not differ disproportionately from other sports. The results of the study show very similar results to previous research that strengthen this study's ability to its findings.

  • 221.
    Visnevska, Lauma
    et al.
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Hassel, Frida
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Varför avslutas en elitidrottssatsning i ungdomsåren?: En intervjustudie kring vilka de vanligaste faktorerna som bidrog till en avslutad elitidrottssatsning i ungdomsåren.2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to examine the most common reasons why young elite athletes dropped out their sport at the top level. To study this case, we collected our data with an interview as a method and Interpretative Phenomenological Analysis as instrument to interpreted participants citations into the factors. These factors later were categorized under different themes: Other, Internal and External factors, Sickness and Injuries. The most common reasons quoted was exhaustion (psychological) and fatigue (physical), too high performance requirement, environmental change, conflict of interest, too demanding training environment and lack of leadership skills.

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  • 222. Wang, Li
    et al.
    Psilander, Niklas
    Tonkonogi, Michail
    Dalarna University, School of Education, Health and Social Studies, Sport and Health Science.
    Ding, Shuzhe
    Sahlin, Kent
    Similar expression of oxidative genes after interval and continuous exercise2009In: Medicine & Science in Sports & Exercise, ISSN 0195-9131, E-ISSN 1530-0315, Vol. 41, no 12, p. 2136-2144Article in journal (Refereed)
    Abstract [en]

    Purpose: There is a debate whether interval or traditional endurance training is the most effective stimulus of mitochondrial biogenesis. Here, we compared the effects of acute interval exercise (IE) or continuous exercise (CE) on the muscle messenger RNA (mRNA) content for several genes involved in mitochondrial biogenesis and lipid metabolism.

    Methods: Nine sedentary subjects cycled for 90 min with two protocols: CE (at 67% V?O2max) and IE (12 s at 120% and 18 s at 20% of V?O2max). The duration of exercise and work performed with CE and IE was identical. Muscle biopsies were taken before and 3 h after exercise. Results: There were no significant differences between the two exercise protocols in the increases in V?O2 and HR, the reduction in muscle glycogen (35%-40% with both protocols) or the changes in blood metabolites (lactate, glucose, and fatty acids). The mRNA content for major regulators of mitochondrial biogenesis [peroxisome proliferator-activated receptor (PPAR) ? coactivator 1a (PGC-1a), PGC-1-related coactivator, PPAR/d] and of lipid metabolism [pyruvate dehydrogenase kinase isozyme 4 (PDK4)] increased after exercise, but there was no significant difference between IE and CE. However, the mRNA content for several downstream targets of PGC-1a increased significantly only after CE, and mRNA content for nuclear respiratory factor 2 was significantly higher after CE (P < 0.025 vs IE).

    Conclusions: The present findings demonstrate that, when the duration of exercise and work performed is the same, IE and CE influence the transcription of genes involved in oxidative metabolism in a similar manner.

  • 223.
    Wedeking, Daniela
    et al.
    Mittuniversitetet, Institutionen för hälsovetenskap.
    Swarén, Mikael
    Swedish Olympic Academy, KTH Royal Institute of Technology, Stockholm, Sweden.
    Danvind, Jonas
    Mittuniversitetet, Institutionen för kvalitets- och maskinteknik.
    Lund Ohlsson, Marie
    Mittuniversitetet, Institutionen för hälsovetenskap.
    The influence of arm and ski pole during alpine skiing2019Conference paper (Refereed)
    Abstract [en]

    INTRODUCTION: Research investigating the correlation between impairment and key performance indicators in para-alpine skiing is needed for a future evidence based classification system (Tweedy and Vanlandewijck 2011). Only a little research in para-alpine skiing exists, especially in the standing classes LW5/7 and LW6/8 (impairment of one or two arms). The use of arms and poles affects performance in alpine skiing[OM1]  but how underlying biomechanical parameters as kinematics and kinetics are related to performance has to the authors knowledge not been studied before.

    PURPOSE: The purpose of this study was to further the understanding of slalom skiing with two ski poles, one pole or without poles (c2, c1, c0) by investigating the biomechanical differences (kinematics and foot plantar pressure) for able-bodied athletes.

    METHODS: Ten able-bodied right-handed junior skiers on national level were tested in three conditions - c0, c1, c2, while skiing a slalom course (28 gates, 62 m vertical drop). 3D kinematic data were collected at 200 Hz by 12 inertial motion units (Myomotion, Noraxon Inc, USA) placed on head, trunk, pelvis, arms and legs. Ski-time was measured with timing gates (XS Crystal Synchronization, Brower Timing Systems, USA) and kinetics were measured with pressure insoles (Pedar, Novel GmbH, Germany) placed inside each ski boot. Normal ground reaction force (nGRF) and relative force time integrals (relFTI) were calculated according to Melai et. Al (2011). Kinematics and plantar pressure were analysed over three right and left turns and averaged for each condition. Right turn and left turn were distinguished at the time point where the shank was standing vertical.

    RESULTS: Time analysis showed that time increased with the use of less ski poles, mean difference between c1c2 of 1.27 ± 1.69 s (p=0.001) and between c0c1 of 0.73 ± 1.95 s (p=0.003[OM2] ). Kinematic analysis showed that different approaches were used to attack a slalom gate in condition c1 and c0, for example slalom-attack, giant slalom attack or opposite arm attack. Interquartile range and median of the body angles [OM3] differed between conditions, e.g. lower median (indicate less deviation from anatomical  basic position[OM4] ) in c0 and mostly lower than in c1 and c2. Furthermore, relFTI was related to the turning side (right or left turn) and showed largest asymmetry for condition c1.

    CONCLUSION: Reduced balance due to missing ski pole/s lead to compensatory movements in the upper body and asymmetry in foot plantar pressure. This reduced the ability for a controlled turn. Whether or not only reduced balance or also the skiers low experience of skiing with reduced number of poles influenced the performance remains unclear.

    REFERENCES

    Melai, Tom, T. Herman IJzerman, Nicolaas C. Schaper, Ton L.H. de Lange, Paul J.B. Willems, Kenneth Meijer, Aloysius G. Lieverse, and Hans H.C.M. Savelberg. 2011. ‘Calculation of Plantar Pressure Time Integral, an Alternative Approach’. Gait & Posture 34 (3): 379–83. https://doi.org/10.1016/j.gaitpost.2011.06.005.

    Tweedy, S. M., and Y. C. Vanlandewijck. 2011. ‘International Paralympic Committee Position Stand--Background and Scientific Principles of Classification in Paralympic Sport’. British Journal of Sports Medicine 45 (4): 259–69. https://doi.org/10.1136/bjsm.2009.065060.

  • 224.
    Westergren, Jens
    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.
    No difference in sprint cycling performance tests on a stationary and mobile ergometer2011In: Medicine & Science in Sports & Exercise, ISSN 0195-9131, E-ISSN 1530-0315, Vol. 43, no 5, p. 161-161Article in journal (Other academic)
2345 201 - 224 of 224
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