Effects of Different Doses of Caffeine on Endurance Exercise Performance in the Heat.

ABSTRACT: This study investigated the effects of different doses of caffeine (3 mg/kg BW and 6 mg/kg BW) on endurance exercise performance in the heat. Seventeen participants completed four randomized, double-blind trials: one in a normal environment (24.6 ± 1.2 °C) and three in a hot environment (33.2 ± 1.4 °C), with placebo, 3 mg/kg BW, and 6 mg/kg BW caffeine interventions. Endurance exercise time, cardiorespiratory function, and subjective fatigue perception were measured during incremental cycling tests. The results showed that high temperatures significantly reduced endurance exercise performance in the placebo (p < 0.001) and 3 mg/kg BW (p = 0.003) groups compared to the normal environment, but not in the 6 mg/kg BW group (p = 1.000). Both caffeine doses improved exercise

SUBMITTER: Wu W 

PROVIDER: S-EPMC11943937 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature