In:
International Journal of Sports Physiology and Performance, Human Kinetics, Vol. 14, No. 5 ( 2019-05-1), p. 665-673
Abstract:
Purpose : To investigate the association between hamstring muscle peak torque and rapid force capacity (rate of torque development, RTD) vs sprint performance in elite youth football players. Methods : Thirty elite academy youth football players (16.75 [1.1] y, 176.9 [6.7] cm, 67.1 [6.9] kg) were included. Isometric peak torque (in Newton meters per kilogram) and early- (0–100 ms) and late- (0–200 ms) phase RTD (RTD 100 , RTD 200 ) (in Newton meters per second per kilogram) of the hamstring muscles were obtained as independent predictor variables. Sprint performance was assessed during a 30-m-sprint trial. Mechanical sprint variables (maximal horizontal force production [ F H0 , in Newtons per kilogram], maximal theoretical velocity [ V 0 , in meters per second], maximal horizontal power output [P max , in watts per kilogram]) and sprint split times (0–5, 0–15, 0–30, and 15–30 m, in seconds) were derived as dependent variables. Subsequently, linear-regression analysis was conducted for each pair of dependent and independent variables. Results : Positive associations were observed between hamstring RTD 100 and F H0 ( r 2 = .241, P = .006) and P max ( r 2 = .227, P = .008). Furthermore, negative associations were observed between hamstring RTD 100 and 0- to 5-m ( r 2 = .206, P = .012), 0- to 15-m ( r 2 = .217, P = .009), and 0- to 30-m sprint time ( r 2 = .169, P = .024). No other associations were observed. Conclusions : The present data indicate that early-phase (0–100 ms) rapid force capacity of the hamstring muscles plays an important role for acceleration capacity in elite youth football players. In contrast, no associations were observed between hamstring muscle function and maximal sprint velocity. This indicates that strength training focusing on improving early-phase hamstring rate of force development may contribute to enhance sprint acceleration performance in this athlete population.
Type of Medium:
Online Resource
ISSN:
1555-0265
,
1555-0273
DOI:
10.1123/ijspp.2018-0464
Language:
Unknown
Publisher:
Human Kinetics
Publication Date:
2019
SSG:
31
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