The Claim

Following 12 weeks of resistance training, increases in muscle total RNA (a proxy for ribosome density) were greater in high responders compared to low responders, but this change accounted for only 8% of the variation in muscle growth, indicating that ribosome biogenesis is a weak correlate rather than a strong driver of hypertrophy.

Source: Biomarkers associated with low, moderate, and high vastus lateralis muscle hypertrophy following 12 weeks of resistance training

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
40score
Challenges
0score

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

Correlation
1 study reviewed
In plain English

People who gain more muscle from weight training also tend to have more RNA in their muscles, but this only explains a tiny part—about 8%—of why they got bigger. So while RNA levels go up, they’re not really the main reason muscles grow.

See the scientific wording

Increases in muscle total RNA (a proxy for ribosome density) following 12 weeks of resistance training were greater in high responders than low responders, but this change explained only 8% of the variation in muscle growth, indicating ribosome biogenesis is a weak correlate, not a strong driver, of hypertrophy.

What the research says

1 study
  1. Study: Biomarkers associated with low, moderate, and high vastus lateralis muscle hypertrophy following 12 weeks of resistance training

    After 12 weeks of weight training, some people’s muscles grew more than others, and those who grew the most also had more ribosomes—but ribosomes only explained a tiny part of why some people grew bigger muscles. So, ribosomes aren’t the main reason muscles get bigger.

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

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

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