The Caffeine Dose Response in Habitual Consumers Performing a 90-s Wingate Test

Caffeine is the most commonly used substance to enhance athletic performance; however, the ideal dosage of caffeine to improve long anaerobic exercise is unknown. The purpose of this study was to investigate the caffeine dose response in habitual consumers using the 90-s Wingate Anaerobic Test (WAnT90). Seven (2 F, 5 M; mean+SD: age = 20.4+1.0 y; body mass = 59.4+7.9 kg) recreationally fit habitual caffeine users (consumption > 2 servings/d) volunteered for a randomized counterbalanced double-blind study. Subjects ingested 3, 5, or 7 mg.kg-1 caffeine or placebo (PLB) 1h prior to testing. The testing protocol included a 3 min warm-up and a WAnT90 with a resistance of 0.05kg.kg-1. Peak power (PP), total power (TP), and total power decline (PD) as well as TP and PD for each 30-s interval were calculated (TP30, TP60, TP90, PD30, PD60, and PD90). Rating of perceived exertion (RPE) was recorded following each test. One-way ANOVA was conducted to compare each dosage of caffeine with each variable across the WAnT...