Metformin blunts muscle hypertrophy in response to progressive resistance exercise training in older adults: A randomized, double-blind, placebo-controlled, multicenter trial: The MASTERS trial.

Aging Cell · 2019 · PMC6826125 · PMID 31557380

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did not reach statistical significanceno p-value reported

There was a trend for blunted strength gains in metformin that did not reach statistical significance.

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