Table 1. Baseline and post-12-week period variations in physical fitness variables. YYIRT baseline (m) YYIRT post (m) YYIRT delta (m) 30-m sprint baseline (s) 30-m sprint post (s) 30-m sprint delta (s) RSA mean baseline (s) RSA mean post (s) RSA mean delta (s) CMJ baseline (cm) CMJ post (cm) CMJ delta (cm) 1398.1±127.3 1550.7±124.7 152.7±20.4 4.32±.05 4.22±.04 >.10±.01 7.70±.08 7.57±.08 >.13±.01 33.2±.7 34.0±.7 .8±.1 YYIRT: Yo-Yo Intermittent recovery test level 1; RSA: repeated sprint ability; CMJ: countermovement jump; Delta represents the absolute values post-baseline.