Impact of dynamic and static stretching methods upon sprint performance and hamstring flexibility
University of Wales Institute Cardiff
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The purpose of this study was to examine the impact of two different methods of stretching within a pre-exercise cardiovascular warm-up upon sprint performance and flexibility. Twelve amateur soccer players were tested for hamstring flexibility and sprint performance after the two different warm-up protocols consisting of static and dynamic stretching. The mean flexibility result was 19.8cm following dynamic stretching methods and are 16.4cm following the static protocol. The standard deviation was slightly greater following the dynamic warm-up compared to that from the static warm-up, 8.4cm compared to 7.3cm respectively. There was a significant difference between hamstring flexibility results following the performance of static and dynamic stretching methods (sig. 0.01). As an overall sample the difference between dynamic stretching and static stretching was an increase of 3.5 cm, with a standard deviation of 2.7cm and a percentage increase of 18%, with a large standard deviation of 12.4%. Following the dynamic intervention the mean sprint performance of all subjects was 2.95 seconds. Calculations showed 3.2 seconds for the mean of the group following static stretches. The standard deviations for both dynamic and static interventions were similar, being 0.14 and 0.13 seconds respectively. There was a significant difference between the results obtained following the two stretching methods (sig.0.00). Overall there was 0.25 seconds difference between each stretch intervention, with a standard deviation of 0.06 seconds. The percentage difference was 8.42% with a standard deviation of 2.27%. Correlation between sprint performance and flexibility following dynamic stretching methods was r = -.625. Following static methods the correlation between the two sets of data was r = -.579. Dynamic Stretching produces significantly greater flexibility results than is achieved following static stretching methods. The same is identified for sprint performance with sprint times being decreased for each subject following dynamic stretches compared with their performance following static stretches. So it appears that dynamic stretching during the warm-up is most effective as preparation for sprint performance.
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