Studies have shown that caffeine can improve exercise performance and reaction time. In this study, 16 subjects participated in a randomized, double-blind experiment to determine caffeine's effects on agility. Subjects performed the pro-agility shuttle run one hour after caffeine ingestion (6 mg kg -1). No significant change was observed in the pro-agility run after caffeine ingestion compared with placebo (t
(1,15)= -.069, p > .05). In addition, subjects performed the Wingate anaerobic power test one hour after caffeine ingestion (6 mg kg -1) and were measured in terms of peak
power (J), mean power (J), and % power decrease. No significant change was observed in any of these indices. These findings were consistent with previous studies. The results of this study indicate that caffeine does not have an effect on athletic agility. It is possible, however, that changes in experimental protocol could yield different results. Variables such as caffeine dosage and subject training status
could affect the outcome of studies involving caffeine and agility.