Lifting lighter weights might make your slow-twitch muscles grow more than your fast-twitch muscles, according to some new ideas.

Evidence from Studies

Supporting (1)

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Inducing hypertrophic effects of type I skeletal muscle fibers: A hypothetical role of time under load in resistance training aimed at muscular hypertrophy.

Editorial/Opinion

2018 Mar

The study talks about the same idea as the claim: lifting lighter weights might make slow-twitch muscles grow more. It explains why this could happen, supporting the claim.

Contradicting (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

Inducing hypertrophic effects of type I skeletal muscle fibers: A hypothetical role of time under load in resistance training aimed at muscular hypertrophy.

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DOI: 10.1016/j.mehy.2018.01.012

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Lifting heavy weights might make your fast-twitch muscle fibers grow bigger than your slow-twitch ones, according to some new research.

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Lifting heavier weights makes your fast-twitch muscle fibers grow bigger than lifting lighter weights does.

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Lifting lighter weights with more reps might make your slow-twitch muscles grow bigger than lifting heavier weights with fewer reps.

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Lifting lighter weights many times in a row might help grow certain slow-twitch muscles better because they stay working longer.

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When adults lift heavy weights, their fast-twitch muscle fibers grow much more than their slow-twitch ones, based on several studies.

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