Acute effects of dynamic stretching with and without warm-up on sprint and vertical jump performance

The aim of this study was to compare the effect of warm-up with-and without-dynamic stretching on sprint time and vertical jump performance. Fourteen healthy subjects aged 18-25 years old participated. They performed 2 modified warm-up protocols: dynamic warm-up (DWU) and DWU with dynamic stretching (DWU+DS). Warm-up protocol consisted of a 10-minute self-paced jogging and 3x30-m sprints. The DS comprised of heel flick, high knees, hip rolls, walking on toes, alternated straight leg skipping, walking lunges and modified walking lunges. Each stretching was performed for 12 repetitions for 2 sets. Fifty and one hundred meters sprint time and vertical jump height were recorded pre- and post-intervention after 5 minutes of recovery period. Results revealed that both warm-up protocols produced significantly greater (p<0.05) in 50-m and 100-m sprint time than did the pre-intervention. The jump height changed insignificantly (p>0.05) after completion of either warm-up incorporating dynamic stretching or warm-up only. In addition, there was no significant difference (p>0.05) between warm-ups for the sprint time and vertical jump.