Some people who get really strong from weight training might have special tiny molecules in their muscles that help boost a protein involved in muscle growth, but we’re not sure how or if this really works yet.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

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Physiological Differences Between Low Versus High Skeletal Muscle Hypertrophic Responders to Resistance Exercise Training: Current Perspectives and Future Research Directions

Narrative Review

Human

2018

The study found that people who get much stronger from weight training might have special tiny molecules in their muscles that help boost a growth signal called IGF-1 — which is exactly what the claim suggests, though it’s still not fully proven.

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Source Study

Physiological Differences Between Low Versus High Skeletal Muscle Hypertrophic Responders to Resistance Exercise Training: Current Perspectives and Future Research Directions

Score: 1

DOI: 10.3389/fphys.2018.00834

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