How Much Does Training One Limb Strengthen the Other? Pooled Controlled Studies Found 7.8% of Initial Strength, 35.1% of the Trained Limb's Gain, Most Likely Through Neural Adaptation
Oct 25
4 min read
Train one arm and the other gets stronger. It sounds like a trick and it has been known for over a century, which is exactly why the careful studies matter: much of the early literature could not separate real transfer from simply getting better at the strength test. The pooled, properly controlled estimate is smaller than the anecdotes and larger than zero, and it is most useful when one limb cannot train at all.
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