The Claim

Resistance training with low loads (less than 60% of one repetition maximum) may primarily increase hypertrophy of type I muscle fibers relative to type II fibers, as hypothesized based on emerging evidence.

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

What the research says

Not yet evaluated

We are still looking at what the research says.

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.

Cause and effect
1 study reviewed
In plain English

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

See the scientific wording

Resistance training with low loads (<60% of 1 repetition maximum) might primarily augment hypertrophy of type I muscle fibers compared to type II fibers, according to a hypothesis based on emerging evidence.

What the research says

1 study

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

    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.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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