The Chronic Effects of Static and Dynamic Stretching on Agility as Measured by the T-test

The beneficial effect of acute stretching on sports performance has been under debate. There are limited data on the chronic effects of static and dynamic stretching on performance variables. Researchers have recently recommended dynamic stretching over static stretching due to measured deficits in performance (strength and power) associated with the acute affect of static stretching prior to maximal performance. PURPOSE: To determine the chronic effects of static stretching and dynamic stretching on agility. METHODS: Participants included 25 female high school volleyball players (M age=15.1 years). Participants were randomized into either a static stretching (n = 13) or dynamic stretching (n = 12) group. The stretching intervention, which included either a static or dynamic hamstring stretch, was performed 3 days per week for 4 continuous weeks. Agility was assessed pre-and post-intervention using the T-test agility run. RESULTS: Following the stretching intervention, there was a statistically significant improvement in agility within the static stretching group (t (1, 12) = 2.417, p p < .0001). Between groups, there was no significant difference in the change in agility following the stretching intervention (F = .30, P > .05). CONCLUSION: Static stretching resulted in greater improvements in agility than dynamic stretching in high school volleyball players over a 4 week intervention period. More research needs to be done on varying stretching techniques and agility before selecting the best technique to increase agility.