The Effect of Plyometric Training Volume in Prepubertal Male Soccer Players´ Athletic Performance
The aim of this study was to assess and to compare the effects of 8-weeks in-season (2 sessions per-week) low and high-volume plyometric training (PT) on measures of physical fitness in prepubertal male soccer players.
A total of twenty-five soccer players were randomly assigned to low-volume plyometric training group (LPT; n=13; age = 12.68 ± 0.23 years; age at peak height velocity (APHV) = 14.25 ± 0.29 years, maturity-offset = -1.57 ± 0.29 years) and high-volume plyometric training group (HPT; n=12; age = 12.72 ± 0.27 years; APHV = 14.33 ± 0.77 years, maturity-offset = -1.61 ± 0.76 years). Linear sprint test (5-m, 10-m, 20-m, and 30-m), change of direction test (T-test), vertical (squat-jump [SJ] and counter-movement-jump [CMJ]), and horizontal (standing-long-jump [SLJ]) jump ability were carried out pre and post 8-weeks of PT.
A significant main effect of time for sprint outcomes (5-m: p=0.005, ES=0.86; 10-m: p=0.006, ES=0.85; 20-m: p=0.03, ES=0.64, and 30-m: p=0.05, ES=0.57), change of direction (p = 0.002, ES=0.96), vertical (SJ: p=0.008, ES= 0.81); CMJ: p=0.01, ES= 0.73), and horizontal jump ability (SLJ: p = 0.007, ES = 0.83). There were no significant training group × time interactions in all the measured outcomes.
Following 8-weeks of training, results showed similar performance improvement on measures of sprint time, change of direction, and jumping ability between LPT and HPT groups. From a time efficiency perspective, it is recommended to use LPT in prepubertal male soccer players so as to improve their proxies of athletic performance.
Autor / Fonte:Helmi Chaabene, Yassine Negra International Journal of Sports Physiology and Performance 2017 February 9, : 1-22