Research
Mixed
Epigenetic modifications (DNA methylation, histone modification) serve as the molecular mechanism for 'muscle memory,' allowing skeletal muscle to retain information from prior environmental stimuli (like exercise or stress) and respond differently upon re-encounter.
This suggests that past exercise or dietary habits leave a molecular 'mark' on your muscles. This might make it easier to regain fitness after a break (the 'memory' effect) or explain why early-life poor nutrition has lasting effects.
ModerateSupportsMEDIUM confidence
We suggest that epigenetics, in particular, could mechanistically underpin muscle memory as defined above... We therefore believe that skeletal muscle memory is underpinned by epigenetic modifications ('epi'-memory).
Why this rating
Based on a review of mechanisms; direct causal proof in humans is still emerging.
Source
Does skeletal muscle have an ‘epi’‐memory? The role of epigenetics in nutritional programming, metabolic disease, aging and exercise
Adam P. Sharples et al. · Aging Cell · 2016
DOI 10.1111/acel.12486
narrative_reviewCited 183×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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