The Claim

Resistance training with free weights at 6–8 sets per muscle group per week does not significantly increase muscle thickness in the vastus lateralis of post-menopausal women, while pre-menopausal women show a trend toward improvement, suggesting regional muscle adaptations may be hormonally modulated.

Source: Resistance training alters body composition in middle-aged women depending on menopause - A 20-week control trial

What the research says

Supports is higher

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

Supports
69score
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.

How it works
1 study reviewed
In plain English

In post-menopausal women, resistance training with free weights at 6–8 sets per muscle group per week does not significantly increase muscle thickness in the vastus lateralis, while pre-menopausal women show a trend toward increased muscle thickness in the same muscle.

See the scientific wording

Resistance training with free weights at 6–8 sets per muscle group per week does not significantly increase muscle thickness in the vastus lateralis of post-menopausal women, while pre-menopausal women show a trend toward improvement, suggesting regional muscle adaptations may be hormonally modulated.

Why this might work

When muscles are stressed by lifting weights, signals are sent to muscle repair cells to grow new tissue. In women with normal estrogen levels, these signals strongly activate the repair cells and boost protein building. In women with low estrogen, the same weightlifting does not activate the repair cells enough to make muscles bigger, even though the muscles are worked just as hard.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Resistance training alters body composition in middle-aged women depending on menopause - A 20-week control trial

    Women who haven’t gone through menopause saw a slight increase in their front thigh muscle size after doing the same leg workouts as women who had gone through menopause — but the post-menopausal women didn’t get bigger. This suggests hormones might affect how muscles respond to exercise.

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

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