Key result
Dietary nitrate supplementation significantly increased maximal muscle power compared to placebo (Hedge's g 0.42; 95% CI 0.29-0.56; p=6.31x10^-11).
Why the study?
Previous conclusions that dietary nitrate improves maximal neuromuscular power were based on limited studies without quantifying the exact magnitude of the effect.
Does dietary nitrate supplementation improve maximal muscle power in humans?
Meta-Analysis (n=268)
Double-blind
Does dietary nitrate supplementation improve maximal muscle power in humans?
Standardized Mean Difference: 0.42 (95% CI 0.29–0.56)
p-value: p=6.310 × 10−11
Acute or chronic dietary nitrate intake significantly increases maximal muscle power in humans by an average of ~5%.
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Supports ~5% power gains with nitrate; extends prior reviews by quantifying effect size for trial design.
Coggan et al. (2021) reported a meta-analysis. Dietary nitrate (NO3-) vs. Placebo was evaluated on Maximal power during exercise in the non-fatigued state (Hedge's g 0.42, 95% CI 0.29, 0.56, p=6.310 × 10−11). Dietary nitrate supplementation significantly increased maximal muscle power compared to placebo (Hedge's g 0.42; 95% CI 0.29-0.56; p=6.31x10^-11).
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