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Nilsson, Johnny
Publications (10 of 12) Show all publications
Carlsson, M., Isberg, J., Nilsson, J. & Carlsson, T. (2019). The acute effects of a short technique-intense training period on side-foot kick performance among elite female soccer players. Journal of Sports Medicine and Physical Fitness, 59(9), 1442-1449
Open this publication in new window or tab >>The acute effects of a short technique-intense training period on side-foot kick performance among elite female soccer players
2019 (English)In: Journal of Sports Medicine and Physical Fitness, ISSN 0022-4707, E-ISSN 1827-1928, Vol. 59, no 9, p. 1442-1449Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Previously, it was shown that elite soccer teams were 24% more likely to win matches if their passing effectiveness were increased by 1%. However, research interventions aiming to improve passing performance are scarce. The current study aimed to investigate the effect of a short technique-intense training period on side-foot kick performance among elite female soccer players.

METHODS: Four side-foot kick tests were completed before and after a training period: kicking a stationary ball using match-relevant (SBRS) and maximal ball speed (SBMS), passing the ball on the move using match-relevant ball speed (RBRS), and repeated side-foot kicks onto a rebound-box with continuously increasing passing distance (RRB). The players were assigned to either the intervention group or the control group. The training intervention consisted of six 55-min training sessions with five side-foot kick exercises. Within-group and between-group differences were investigated using paired-samples t-test and Mann-Whitney U test, respectively.

RESULTS: The intervention group improved the performance in the RBRS and RRB tests (both P < 0.05), but no differences were found for the SBRS and SBMS tests (both P > 0.05). No improvements were found for the control group independent of test condition (all P > 0.05). Significant between-group differences were found for the RBRS and RRB tests (both P < 0.05), whereas no differences were found for the SBRS and SBMS tests (both P > 0.05).

CONCLUSIONS: The fundamental soccer skill of passing a moving ball was improved in elite female soccer players by a short technique-intense training period.

National Category
Sport and Fitness Sciences
Research subject
Health and Welfare; Health and Welfare
Identifiers
urn:nbn:se:du-29527 (URN)10.23736/S0022-4707.19.09449-0 (DOI)000490249900002 ()30761813 (PubMedID)2-s2.0-85073175864 (Scopus ID)
Available from: 2019-02-19 Created: 2019-02-19 Last updated: 2019-10-31Bibliographically approved
Carlsson, M., Nilsson, J., Hellström, J., Tinmark, F. & Carlsson, T. (2019). The effect of ball temperature on ball speed and carry distance in golf drives. Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, 233(2), 186-192
Open this publication in new window or tab >>The effect of ball temperature on ball speed and carry distance in golf drives
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2019 (English)In: Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, ISSN 1754-3371, Vol. 233, no 2, p. 186-192Article in journal (Refereed) Published
Abstract [en]

The purpose of this study was to investigate the effect of ball temperature on impact ball speed and carry distance during golf drives in a blind randomized test design. The balls were exposed to a temperature-controlled environment (4 °C, 18 °C, 32 °C, and 46 °C) for 24 h prior to the test and each temperature group consisted of 30 balls. The 120 drives were performed by an elite male golfer (handicap: 0.0) in an indoor driving range. All drives were measured by a Doppler-radar system to determine the club-head speed, launch angle, spin rate, ball speed, and carry distance. Differences between the groups were investigated using a one-way analysis of variance. The results indicated that ball-speed and carry-distance differences occurred within the four groups (p < 0.001 and p < 0.01, respectively). The post hoc analyses showed that the ball temperatures of 18 °C and 32 °C had greater ball speeds and carry distances than balls at 4 °C and 46 °C (all p < 0.05). The intervals for the between-group differences were 0.6–0.7 m s−1 and 2.9–3.9 m for ball speed and carry distance, respectively. Hence, the results showed that ball temperature influences both the ball speed and the carry distance. Based on the findings in this study, standardization of ball temperature should be factored into governing body regulation tests for golf equipment.

Keywords
Golf ball, club-head speed, carry distance, ball speed, ball temperature, launch angle, spin rate, Doppler radar
National Category
Sport and Fitness Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-28803 (URN)10.1177/1754337118812618 (DOI)000469879800002 ()2-s2.0-85059043849 (Scopus ID)
Available from: 2018-10-20 Created: 2018-10-20 Last updated: 2019-06-20Bibliographically approved
Isberg, J., Carlsson, M., Nilsson, J. & Carlsson, T. (2018). Effekten av en träningsintervention avseende kvinnliga elitfotbollsspelares bredsidespassningsprecision och deras uppfattning om sin tekniska färdighet. In: : . Paper presented at Swedish Behavioural and Social Science Sport Research (SVEBI) annual conference in Falun, Sweden, 21-22 November, 2018.
Open this publication in new window or tab >>Effekten av en träningsintervention avseende kvinnliga elitfotbollsspelares bredsidespassningsprecision och deras uppfattning om sin tekniska färdighet
2018 (Swedish)Conference paper, Oral presentation with published abstract (Refereed)
National Category
Sport and Fitness Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-29663 (URN)
Conference
Swedish Behavioural and Social Science Sport Research (SVEBI) annual conference in Falun, Sweden, 21-22 November, 2018
Available from: 2019-03-17 Created: 2019-03-17 Last updated: 2019-03-18Bibliographically approved
Carlsson, T., Nilsson, J., Hellström, J., Tinmark, F. & Carlsson, M. (2018). The effect of ball temperature on ball speed and carry distance in golf drives. In: : . Paper presented at 23rd annual Congress of the European College of Sport Science, Dublin 4-7 July 2018.
Open this publication in new window or tab >>The effect of ball temperature on ball speed and carry distance in golf drives
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2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

THE EFFECT OF BALL TEMPERATURE ON BALL SPEED AND CARRY DISTANCE IN GOLF DRIVES

Carlsson, T.1, Nilsson, J.1,2, Hellström, J.3, Tinmark, F.2, Carlsson, M.1. 1: Dalarna University (Falun, Sweden), 2: The Swedish School of Sport and Health Sciences (Stockholm, Sweden), 3: The Swedish Golf Federation (Stockholm, Sweden). 

Introduction

Previously it was reported that golf-ball temperature has influence on the golf balls’ coefficient of restitution, impact duration, and maximal deformation (Allen et al., 2012). They concluded that their research was the first step in a process for determining the effect of temperature on a golf drive. However, how large influence the golf-ball temperature has on golf drives remains to be investigated. The purpose was to investigate the effect of ball temperature on impact ball speed and carry distance during golf drives in a blind randomized test design. 

Methods

The balls were exposed to a temperature-controlled environment (4°C, 18°C, 32°C, and 46°C) for twenty-four hours prior to the test, and each of the four different ball-temperature groups consisted of 30 balls. The 120 drives were performed by an elite male golfer (handicap: 0.0) in an indoor driving range. All drives were measured by a Doppler-radar system to determine club-head speed, launch angle, spin rate, ball speed, and carry distance. Differences between the four ball-temperature groups were investigate using a one-way analysis of variance. 

Results

The results indicate that there are ball-speed and carry-distance differences within the four ball-temperature groups (P < 0.001 and P < 0.01, respectively). The post-hoc analyses showed that the ball temperatures 18°C and 32°C had both greater ball speeds and carry distances compared to the balls in the ball-temperature groups 4°C and 46°C (all P < 0.05); the intervals for the between-group differences were 2.0 to 2.4 km/h and 2.9 to 3.9 m for ball speed and carry distance, respectively.

Conclusion

The novel results of the current study show that the ball’s temperature has a significant effect on the ball speed after club-head impact and carry distance for drives performed by an elite golfer. The ball temperatures 18°C and 32°C gave significantly increased ball speeds and carry distances compared to the ball-temperature groups 4°C and 46°C. This knowledge could be used to maximise the carry distance and/or to minimise the carry-distance variability related to ball temperature.

REFERENCES:

Allen T, Bowley A, Wood P, Henrikson E, Morales E, James D. (2012) Procedia Eng, 34, 634-639.

National Category
Sport and Fitness Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-27742 (URN)
Conference
23rd annual Congress of the European College of Sport Science, Dublin 4-7 July 2018
Available from: 2018-05-31 Created: 2018-05-31 Last updated: 2018-06-13Bibliographically approved
Carlsson, M., Isberg, J., Nilsson, J. & Carlsson, T. (2018). The effect of training on side foot-kick performance among swedish first league women´s soccer players. In: : . Paper presented at 23rd annual Congress of the European College of Sport Science, Dublin 4-7 July 2018.
Open this publication in new window or tab >>The effect of training on side foot-kick performance among swedish first league women´s soccer players
2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

THE EFFECT OF TRAINING ON SIDE FOOT-KICK PERFORMANCE AMONG SWEDISH FIRST LEAGUE WOMEN’S SOCCER PLAYERS

Carlsson, M.1, Isberg, J.1, Nilsson, J.1, Carlsson, T.1 1: Dalarna University (Falun, Sweden)

Introduction

A high completion rate for passes is important for success in soccer, because longer passing sequences are related to more scored goals (Hughes & Franks, 2005). In a recent study, it was found that female players had a lower pass-completion rate than male players at the highest competitive standard of European soccer, which suggests that elite female players in general do not have the same technical characteristics as elite male players (Paul S. Bradley et al., 2014). The purpose of the study was investigate the effect of a 2-week training intervention on side foot-kick performance among Swedish first league women’s soccer players.

 Methods

To investigate the effect of training on side foot-kick performance, a pre-post-intervention study was implemented where four side foot-kick tests were performed before and after a 2-week training period. The side foot-kick accuracy were investigated when kicking a stationary ball using match-relevant ball speed (SBRS) and maximal ball speed (SBMS) as well as subsequent to a 5-m run with the ball from different approach angles (0°, 30°, and 60°) to a predetermined position, where passing of the ball on the move was executed using match-relevant ball speed (RBRS). The fourth test comprised repeated side-foot kicks onto a rebound-box with continuously increasing passing distance (RRB).

Based on the results from the pre-tests, the players were assigned to either the intervention group (INT) or the control group (CON). The training intervention consisted of six 55-min training sessions. In each session, two rounds of five exercises focusing on improvement of side foot-kick accuracy were executed. Within-group and between-group differences were investigated using paired samples Student’s t-tests and Mann-Whitney U tests, respectively.

Results

Prior to the training intervention, there were no significant differences between the groups for any of the investigated test variables. The INT group improved RBRS (P = 0.036) and RRB (P = 0.010) during the training intervention, whereas no significant within-group changes were found for either SBRS or SBMS (both P > 0.05). No within-group differences were found for any of the test variables in the CON group (all P > 0.05). Significant between-group differences were found for RBRS (P = 0.040) and RRB (P = 0.005), whereas no differences were found for either SBRS or SBMS (both P > 0.05).

Conclusion

The fundamental soccer skill of passing a moving ball could be improved in elite women players by a 2-week training period focusing on improving   side foot-kick performance.

References

Bradley PS, Carling C, Diaz AG, Hood P, Barnes C, Ade J, Boddy M, Krustrup P, Mohr M (2013) Hum Mov Sci, 32, 808-821.

Hughes M, Franks I (2005) J Sports Sci, 23, 509-514.

National Category
Sport and Fitness Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-27743 (URN)
Conference
23rd annual Congress of the European College of Sport Science, Dublin 4-7 July 2018
Available from: 2018-05-31 Created: 2018-05-31 Last updated: 2018-05-31Bibliographically approved
Carlsson, T., Isberg, J., Nilsson, J. & Carlsson, M. (2018). The influence of task conditions on side foot-kick accuracy among swedish first league women’s soccer players. Journal of Sports Science and Medicine (JSSM), 17(1), 74-81
Open this publication in new window or tab >>The influence of task conditions on side foot-kick accuracy among swedish first league women’s soccer players
2018 (English)In: Journal of Sports Science and Medicine (JSSM), ISSN 1303-2968, Vol. 17, no 1, p. 74-81Article in journal (Refereed) Published
National Category
Health Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-27403 (URN)000425786500009 ()2-s2.0-85042639268 (Scopus ID)
Note

Open Access APC beslut 8/2018

Available from: 2018-03-14 Created: 2018-03-14 Last updated: 2018-05-21Bibliographically approved
Quennerstedt, M., Gibbs, B., Almqvist, J., Nilsson, J. & Winther, H. (2017). Beatrice: Dance video games as a resource for teaching dance (1ed.). In: Ashley Casey, Victoria a. Goodyear & Kathleen M. Armour (Ed.), Digital technologies and learning in physical education: Pedagogical cases (pp. 69-85). New York: Routledge
Open this publication in new window or tab >>Beatrice: Dance video games as a resource for teaching dance
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2017 (English)In: Digital technologies and learning in physical education: Pedagogical cases / [ed] Ashley Casey, Victoria a. Goodyear & Kathleen M. Armour, New York: Routledge, 2017, 1, p. 69-85Chapter in book (Other academic)
Place, publisher, year, edition, pages
New York: Routledge, 2017 Edition: 1
National Category
Medical and Health Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-23887 (URN)978-1-138-94729-0 (ISBN)
Available from: 2016-12-31 Created: 2016-12-31 Last updated: 2017-01-01Bibliographically approved
Cardinale, D., Cardinale, M. & Nilsson, J. (2017). Comparison between single and combined data collection methods in loaded squat jump power output. Gazzetta Medica Italiana, 176(6), 315-321
Open this publication in new window or tab >>Comparison between single and combined data collection methods in loaded squat jump power output
2017 (English)In: Gazzetta Medica Italiana, ISSN 0393-3660, E-ISSN 1827-1812, Vol. 176, no 6, p. 315-321Article in journal, Editorial material (Refereed) Published
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.

Keywords
Plyometric exercise, muscle strength, resistance training, athletic performance
National Category
Sport and Fitness Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-23886 (URN)10.23736/S0393-3660.16.03378-7 (DOI)2-s2.0-85019586996 (Scopus ID)
Available from: 2016-12-31 Created: 2016-12-31 Last updated: 2017-06-12Bibliographically approved
Carlsson, T., Wedholm, L., Nilsson, J. & Carlsson, M. (2017). The effects of strength training versus ski-ergometer training on double-poling capacity of elite junior cross-country skiers. European Journal of Applied Physiology, 117(8), 1523-1532
Open this publication in new window or tab >>The effects of strength training versus ski-ergometer training on double-poling capacity of elite junior cross-country skiers
2017 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 117, no 8, p. 1523-1532Article in journal (Refereed) Published
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.

Keywords
Cross-country skiing; VO2peak; double polnig; gross efficiency; maximal speed; gendeer differences
National Category
Sport and Fitness Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-25100 (URN)10.1007/s00421-017-3621-1 (DOI)000407726800001 ()28597103 (PubMedID)
Available from: 2017-06-05 Created: 2017-06-05 Last updated: 2018-04-24Bibliographically approved
Nilsson, J. & Cardinale, D. (2015). Aerobic and anaerobic test performance among elite male football players in different team positions. LASE Journal of Sport Science, 6(2), 73-92
Open this publication in new window or tab >>Aerobic and anaerobic test performance among elite male football players in different team positions
2015 (English)In: LASE Journal of Sport Science, ISSN 1691-7669, E-ISSN 1691-9912, Vol. 6, no 2, p. 73-92Article in journal (Refereed) Published
Abstract [en]

The purpose was to determine the magnitude of aerobic and anaerobic performance factors among elite male football players in different team positions. Thirty-nine players from the highest Swedish division classified as defenders (n=18), midfield players (n=12) or attackers (n=9) participated. Their mean (± sd) age, height and body mass (bm) were 24.4 (±4.7) years, 1.80 (±5.9)m and 79 (±7.6)kg, respectively. Running economy (RE) and anaerobic threshold (AT) was determined at 10, 12, 14, and 16km/h followed by tests of maximal oxygen uptake (VO2max). Maximal strength (1RM) and average power output (AP) was performed in squat lifting. Squat jump (SJ), counter-movement jump with free arm swing (CMJa), 45m maximal sprint and the Wingate test was performed. Average VO2max for the whole population (WP) was 57.0mL O2•kg-1min-1 . The average AT occurred at about 84% of VO2max. 1RM per kg bm0.67 was 11.9±1.3kg. Average squat power in the whole population at 40% 1RM was 70±9.5W per kg bm0.67 . SJ and CMJa were 38.6±3.8cm and 48.9±4.4cm, respectively. The average sprint time (45m) was 5.78± 0.16s. The AP in the Wingate test was 10.6±0.9W•kg-1 . The average maximal oxygen uptake among players in the highest Swedish division was lower compared to international elite players but the Swedish players were better off concerning the anaerobic threshold and in the anaerobic tests. No significant differences were revealed between defenders, midfielders or attackers concerning the tested parameters presented above.

Keywords
football, physical performance, plays position
National Category
Health Sciences
Research subject
Health and Welfare
Identifiers
urn:nbn:se:du-20803 (URN)
Available from: 2016-01-18 Created: 2016-01-18 Last updated: 2017-05-31Bibliographically approved
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