The Claim

Feminizing hormone therapy in transgender women is associated with a progressive decline in upper body strength, with push-up performance reaching levels comparable to cisgender women after 2 years, indicating that muscle strength adaptations occur gradually over time rather than immediately.

Source: Effect of gender affirming hormones on athletic performance in transwomen and transmen: implications for sporting organisations and legislators

What the research says

Supports is higher

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

Supports
49score
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

Trans women on feminizing hormones slowly lose upper body strength over time, and after about 2 years, their push-up ability becomes similar to that of cis women.

See the scientific wording

Feminizing hormone therapy in transwomen is associated with a progressive decline in upper body strength, with push-up performance equalizing to cisgender female levels after 2 years, indicating that muscle strength adaptations occur gradually over time rather than immediately.

What the research says

1 study
  1. Study: Effect of gender affirming hormones on athletic performance in transwomen and transmen: implications for sporting organisations and legislators

    The study shows that transwomen start with more push-up strength than cisgender women, but after 2 years on feminizing hormones, that difference goes away, which supports the idea that strength decreases over time to match cisgender women's levels.

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

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