The Claim

Mechanical tension is the primary driver of muscle hypertrophy, and only exercise techniques that increase mechanical tension on the target muscle promote muscle growth.

Source: 2 Things I CAN’T STAND about science-based lifting

What the research says

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Supports
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Challenges
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These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
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In plain English

Muscles get bigger when they're put under tension during exercise - like when you lift weights. Only exercises that make your muscles work hard against resistance will help them grow.

See the scientific wording

Muscle hypertrophy is primarily driven by mechanical tension placed on the muscle; only exercise techniques that increase tension on the target muscle should promote muscle growth.

Score breakdown, mechanism chain, raw evidence, ideal studies needed

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.