Slow-Speed Compared With Fast-Speed Eccentric Muscle Actions Are Detrimental to Jump Performance in Elite Soccer Players In-Season.

Autor:	Segers N; Faculty of Sport, Health and Applied Science, St Mary's University, London,United Kingdom.; Football Club Twente, Enschede,the Netherlands., Waldron M; A-STEM Research Centre, College of Engineering, Swansea University, Swansea,United Kingdom.; School of Health and Behavioural Sciences, University of the Sunshine Coast, QLD,Australia.; Welsh Institute of Performance Science, Swansea University, Swansea,United Kingdom., Howe LP; School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester,United Kingdom., Patterson SD; Faculty of Sport, Health and Applied Science, St Mary's University, London,United Kingdom., Moran J; School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester,United Kingdom., Jones B; School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester,United Kingdom., Kidgell DJ; Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne,Australia., Tallent J; School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester,United Kingdom.; Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne,Australia.
Jazyk:	angličtina
Zdroj:	International journal of sports physiology and performance [Int J Sports Physiol Perform] 2022 Jul 27; Vol. 17 (9), pp. 1425-1431. Date of Electronic Publication: 2022 Jul 27 (Print Publication: 2022).
DOI:	10.1123/ijspp.2021-0542
Abstrakt:	Purpose: To examine the effect of fast- versus slow-speed eccentric-muscle-action resistance training on lower-body strength, vertical jump height, sprint speed, and change-of-direction performance in elite soccer players during a competitive season. Methods: Twenty-two elite soccer players, from a single team, were randomly assigned to groups that undertook either 1- (fast speed) or 4-second (slow speed) eccentric resistance training during the in-season period. A 5-week program was conducted during an elite top-division European League soccer season. Performance measures including predicted 1-repetition-maximum back squat, countermovement jump, 20-m sprint, and change of direction were tested before and after the intervention period. Total match and training running distance and muscle soreness were also recorded during each week of the intervention. Results: An analysis of covariance showed significant group effects (P = .01) for countermovement jump with a greater jump height in the 1-second fast-speed group postintervention (95% CI, 1.1-6.9 cm). Despite an overall increase in 1-repetition maximum pretraining to posttraining (95% CI, 10.0-15.3 kg, effect size 0.69), there were no significant differences (P > .05) between groups after the intervention. Similarly, there were no differences between groups for change of direction, 20-m sprint, or muscle soreness. Conclusion: Faster eccentric muscle actions may be superior for increasing movements in elite soccer players in-season.
Databáze:	MEDLINE
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