Effects of Caffeine on Repeated Sprint Performance in Male Swimmers
Dr. Maureen Dunn, Hope College
The aim of this study was to examine the effects of various doses of caffeine on repeated sprint performance in collegiate male swimmers (n= 10). Each participant completed six 100-yard sprints on 3 separate test dates. On each occasion, athletes ingested either 3 or 6 mg/kg caffeine or placebo one hour prior to exercise in a counterbalanced, double-blind manner. Sprint time, lactate level, and rate of perceived exertion (RPE) were assessed on each test date. Mean sprint time for all 6 sprints decreased from the first testing day compared to the third testing day (p> 0.01). There was no effect of caffeine on mean sprint time or RPE, although there was a trend for decreased RPE in the 6 mg/kg caffeine trial compared to placebo and 3 mg/kg caffeine (P=0.09). Lactate production following sprinting was significantly increased during caffeine trials compared to placebo (p< 0.01). There was no difference between caffeine doses on lactate production. Results indicate that the use of caffeine as an ergogenic aid is neither detrimental nor enhancing to performance.
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