The Claim

In post-menopausal women, gains in maximal isometric voluntary contraction (MIVC) are a stronger predictor of improved exercise tolerance (W′) than gains in thigh lean body mass, with MIVC explaining 52% of the variation in W′ and remaining a significant predictor (33%, p=0.002) after adjusting for changes in muscle mass.

Source: Resistance training-induced improvement in exercise tolerance is not dependent on muscle mass gain in post-menopausal women

What the research says

Supports is higher

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

Supports
48score
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

In post-menopausal women, increases in maximal muscle strength predict improved exercise tolerance better than increases in thigh muscle mass, with muscle strength accounting for 52% of the variation in exercise tolerance and still explaining 33% after accounting for muscle mass changes.

See the scientific wording

In post-menopausal women, gains in maximal isometric voluntary contraction (MIVC) are a stronger predictor of improved exercise tolerance (W′) than gains in thigh lean body mass, with MIVC explaining 52% of W′ variation and remaining a significant predictor (33%, p=0.002) after adjusting for muscle mass changes.

Why this might work

When muscles are trained to push harder, the nervous system sends stronger signals to activate more muscle fibers at once and fire them faster. This allows the muscle to produce more force without getting bigger. The increased force makes it possible to sustain high-intensity effort longer before fatigue sets in, which improves how long a person can keep exercising.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Resistance training-induced improvement in exercise tolerance is not dependent on muscle mass gain in post-menopausal women

    In older women, getting stronger (able to push/pull harder) matters more for lasting longer during exercise than just gaining muscle size. The study found that strength improvements explained most of the endurance gains, even when muscle size was taken into account.

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

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