Transgender women runners stay about as competitive in their age group after starting hormone therapy, even though their actual race times slow down a bit.

44

Pro

0

Against

Evidence from Studies

Supporting (1)

44

Community contributions welcome

44

Longitudinal Performance Changes in Transgender Women Athletes Pre and Post Gender Affirming Hormone Therapy

Cohort Study

Human

2025 Sep

The study found that although transgender women ran slower after hormone therapy, their performance compared to others in their age group stayed about the same.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Longitudinal Performance Changes in Transgender Women Athletes Pre and Post Gender Affirming Hormone Therapy

Score: 44

DOI: 10.1002/ejsc.70036

Similar Assertions

For transgender women runners, boosting their training might help maintain their running performance after starting hormone therapy.

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Trans women who aren't athletes seem to run about as well as cis women after two years on hormone therapy — their endurance might become similar during that time.

1

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Trans women runners get slower over time after starting hormone therapy, especially in longer races — their race times go up by about 14-17%, while sprints are less affected.

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Trans women athletes tend to slow down more in long races after hormone therapy than in short sprints—suggesting endurance is affected more than quick bursts of power.

44

0

79%

Trans guys on testosterone get just as good at running 1.5 miles as cis guys within a year — starting out about 15% slower but catching up completely thanks to hormone therapy.

49

0

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