The purpose of this study was to examine the effects of ballistic stretching in a warm-up on sprintperformance. Twenty three healthy participants with CAI (23 men: 19.9±1.04yrs, 169.3±6.21cm, 65.8±10.84kg) volunteered to take part in this study. Participants performed a 30 m sprint after a warm-upprotocol that commenced with 3 minutes jogging, followed by ballistic stretching (BS) or no stretching(NS). The BS routine included 6 exercises for each 10 seconds targeting the lower-body musculature. Thetrials were separated by a week and they were randomly assigned. Results indicated that BS of the sprinttimes was quicker than NS, especially in 0-10m (p<0.05). These results suggest that inclusion of the 10seconds BS routine in worm-up enhances sprint performance compared to no stretching.