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Importance of Muscle Power Variables in Repeated and Single Sprint Performance in Soccer Players

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López-Segovia M., Dellal A., Chamari K., González-Badillo J. J.

Journal of Human Kinetics

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2014

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vol. 40

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issue 1

201-211

EN

This study examined the relationship between lower body power and repeated as well as single sprint performance in soccer players. The performance of nineteen male soccer players was examined. The first testing session included the countermovement jump (CMJL) and the progressive full squat (FSL), both with external loads. Power in the CMJL and FSL was measured with each load that was lifted. The second session included a protocol of 40-m repeated sprints with a long recovery period (2 min). The number of sprints executed until there was a 3% decrease in performance for the best 40-m sprint time was recorded as a repeated sprint index (RSI). The RSI was moderately associated with power output relative to body mass in the CMJL and FSL (r = 0.53/0.54, p ≤ 0.05). The most and least powerful players (determined by FSL) showed significant differences in the RSI (9.1 ± 4.2 vs. 6.5 ± 1.6) and 10 m sprint time (p [...] 0.01). Repeated and single sprints are associated with relatively lower body power in soccer players.

2

Concentric and Eccentric: Muscle Contraction or Exercise?

100%

Padulo J., Laffaye G., Ardigò L. P., Chamari K.

Journal of Human Kinetics

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2013

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vol. 37

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issue 1

5-6

3

Heart Rate Responses and Training Load During Nonspecific and Specific Aerobic Training in Adolescent Taekwondo Athletes

88%

Haddad M., Chaouachi A., Wong D., Castagna C., Chamari K.

Journal of Human Kinetics

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2011

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vol. 29

59-66

EN

The efficacy of replacing generic running with Taekwondo (TKD) specific technical skills during interval training at an intensity corresponding to 90-95% of maximum heart rate (HRmax) has not yet been demonstrated. Therefore, the purpose of this study was to compare the HR responses and perceived exertion between controlled running and high-intensity TKD technical interval training in adolescent TKD athletes. Eighteen adolescent, male TKD athletes performed short-duration interval running and TKD specific technical skills (i.e. 10-20 [10-s of exercise interspersed with 20 s of passive recovery]) in a counterbalanced design. In both training methods, HR was measured and expressed as the percentage of HR reserve (%HRres). Rating of perceived exertion (RPE, Borg's category rating-10 scale), Banister's training impulse (TRIMP) and Edwards' training load (TL) were used to quantify the internal training load. Recorded cardiovascular responses expressed in %HRres in the two training methods were not significantly different (p > 0.05). Furthermore, the two training methods induced similar training loads as calculated by Banister and Edwards' methods. Perceived exertion ranged between "hard" and "very hard" during all interval training sessions. These findings showed that performing repeated TKD specific skills increased HR to the same level, and were perceived as producing the same training intensity as did short-duration interval running in adolescent TKD athletes. Therefore, using specific TKD kicking exercises in high-intensity interval training can be applied to bring more variety during training, mixing physical and technical aspects of the sport, while reaching the same intensity as interval running.

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3 Journal of Human Kinetics

1 2014

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3 Chamari K.

1 Ardigò L. P.

1 Castagna C.

1 Chaouachi A.

1 Dellal A.

1 González-Badillo J. J.

1 Haddad M.

1 Laffaye G.

1 López-Segovia M.

1 Padulo J.

1 Wong D.

Importance of Muscle Power Variables in Repeated and Single Sprint Performance in Soccer Players

Concentric and Eccentric: Muscle Contraction or Exercise?

Heart Rate Responses and Training Load During Nonspecific and Specific Aerobic Training in Adolescent Taekwondo Athletes