Acute effects of caffeine supplementation on resistance exercise, jumping, and Wingate performance: no influence of habitual caffeine intake

Study answer

What this study found

Caffeine improved resistance-exercise, jumping, and Wingate performance overall, and habitual caffeine intake did not significantly blunt these acute effects. Compared with placebo, caffeine increased mean power at 25% 1RM by 123 (66, 180) W, mean velocity at 25% 1RM by 0.03 (0.01, 0.05) m/s, and CMJ height by 0.9 cm; muscular endurance also improved, with condition effects p < 0.001. Wingate peak, mean, and minimum power all favored caffeine, with condition effects p < 0.001, p < 0.001, and p = 0.012, respectively. No group × condition interaction was significant, and correlations between…

Study & population

Randomized, double-blind, counterbalanced crossover study in 24 resistance-trained adult men from Australia.

Intervention

Caffeine was given as a single oral capsule at 3 mg/kg, taken 60 minutes before the exercise session.

Key limitation

Small sample size and only male resistance-trained participants limit generalizability.

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Original abstract