Load and muscle group size influence the ergogenic effect of acute caffeine intake in muscular strength, power and endurance.

Introduction: Although acute caffeine intake seems to improve muscular strength-power-endurance performance, there is scarce evidence evaluating upper vs lower-body exercises at different loads. Thus, this study aimed to examine the effects of acute caffeine intake on upper and lower-body muscular strength, power and endurance performance at different loads.

Methods: Twenty resistance-trained athletes (male/female: 10/10; age: 23 ± 4 years; body mass: 70.