The aim of this study was to investigate the acute effects of 16 different combinations to cause the postactivation potentiation (PAP) in elite young soccer players. Squat exercise in 4 different intensities (40%, 60%, 80%, and 100% one-repetition maximum [1RM]) was performed and its effects were evaluated in the performance of countermovement jump (CMJ), after 4 different recovery times (1, 3, 5, and 10 min). For this purpose, 25 young soccer players, underwent five experimental ses-sions. At the first session the control to determine 1RM in half-squat was carried out. The following four experimental sessions were com-prised of four intensity combinations with four different recovery inter-vals in order to perform the CMJ test later, randomly determined and with 30-min interval between each combination. The conditions were compared using an analysis of variance with repeated measurements, followed by Bonferroni test, using 5% significance level (P<0.05). The different intensities investigated did not provide significant increases in CMJ height, but significant differences were noted in recovery time, where, at CMJ maximum height, 1-min interval was better than after 3 min (P<0.05), 5, and 10 min (P<0.001). On the average jump perfor-mances, 1-min interval resulted in better results (P<0.001) compared to other intervals. The 10-min recovery resulted in poorer performances compared to the other intervals (P<0.001). Our results indicate that re-gardless the intensity used in the half-squat exercise with elite young soccer players, the 1-min recovery time was more appropriate to pro-mote an increase in vertical jump.
목차
Abstract INTRODUCTION MATERIALS AND METHODS Subjects Experimental procedures Repetition maximum protocol Vertical jump test Statistical analysis RESULTS DISCUSSION CONFLICT OF INTEREST REFERENCES