Repost - already posted in GenderCritical before this circle was created.

Firstly, the study by Roberts et al;

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

Summarised in Science Daily: https://www.sciencedaily.com/releases/2020/12/201207195133.htm

Results: Key result: 1.5 mile run performance in TiMs remains significantly faster than in women even after three years of testosterone reduction. It starts 21% faster, and then TiM's do slow down, but remain 12% faster than women in the third year. So testosterone reduction doesn’t remove male advantage

Clear discussion by Ross Tucker: https://twitter.com/Scienceofsport/status/1336207510513065986

Review Study by Hilton et al.

This is not original research, but collates various findings. Full text here: https://link.springer.com/article/10.1007/s40279-020-01389-3

Key conclusion: the muscular advantage enjoyed by transgender women is only minimally reduced when testosterone is suppressed.

Twitter thread: https://twitter.com/FondOfBeetles/status/1336280822794563584