This study investigated the effects of plyometric training on change-of-direction speed (CODS) among college athletes who specialized in ball sports. Forty male college athletes (age, 19.9±1.06years; height, 173.4±6.24cm; Weight, 66.8±6.65kg) were participated in this study. The participants were randomly divided into 2 groups: training group and control group. The subjects in the training group had a 12-week plyometric training session. The subjects in this control group had no training sessions. Before and after the 12-week period, all subjects had a testing session to evaluate their physical abilities.
In the training group, significant improvements were observed in all comparisons including all jumping items, straight-line sprinting, and CODS (p<0.05) and effects size was great. Moreover an improvement in VJ and RJ-index could make advance on CODS significantly.
