Different types of muscle fibers in your calf muscles don't affect how much they grow from lifting heavy or light weights, because both the mostly slow-twitch and mixed fiber muscles grew about the same with both types of training.

41

Pro

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Against

Evidence from Studies

Supporting (1)

41

Community contributions welcome

41

Do the anatomical and physiological properties of a muscle determine its adaptive response to different loading protocols?

Randomized Controlled Trial

Human

2020 May

The study tested whether heavy or light weights make different calf muscles grow more based on their fiber types, and found both grew similarly no matter the weight, which matches the claim.

Contradicting (0)

0

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Do the anatomical and physiological properties of a muscle determine its adaptive response to different loading protocols?

Score: 41

DOI: 10.14814/phy2.14427

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