Effects of different doses of caffeine on exercise responses in young children.

Introduction/purpose: This study investigated the effects of three different doses of caffeine on physiological responses to exercise in young children.

Methods: Forty healthy children (20 boys and 20 girls) volunteered for a random, double-blind, counterbalanced study where they received either placebo (PL), 1 mg.kg(-1) (CAF-1), 3 mg.