Trans female athletes: elite competition bans not supported by science, report says

A new report commissioned by the Canadian Centre for Ethics in Sport (CCES) says there’s no reliable evidence pointing to a performance advantage in elite trans women who have suppressed their testosterone

Does running lower testosterone?

Training hard but getting slower? Low testosterone could be the culprit

Testosterone study shows aerobic benefit in female athletes

It claims to be the first randomized, placebo-controlled, double-blind to directly measure the effect of increased testosterone in women on running performance