Percentual de hidratação e taxa de sudorese em jogadores de futebol em suplementação aguda de cafeína: um estudo clínico randomizado

Abstract

This study investigated the impact of acute caffeine supplementation on the hydration status of soccer players under different training and environmental conditions. The research involved two groups: one supplemented with 6 mg/kg of caffeine and the other with a placebo, assessed over four days. Dehydration rates were analyzed considering factors such as training duration, ambient temperature, and time of day. Results showed that on days with higher temperatures or more intense training sessions, caffeine significantly amplified dehydration rates, while its effect was less pronounced under milder conditions. Statistical analyses, including t-tests and ANOVA, revealed that although differences between groups were not statistically significant in all cases, the effect of caffeine was more noticeable on critical days. It is concluded that caffeine supplementation requires caution on days with higher physical and thermal demands, emphasizing the importance of personalized supplementation strategies. This study enhances the understanding of the interactions between caffeine, hydration, and athletic performance, offering practical insights for athletes and professionals in the field.