Yes, bio men also have different body proportions. If Jillian stood alongside ten bio women of the same height, her/his arms would be longer. This has an advantage in certain sports, including cycling. Longer arms, relative to body height, means the cyclist doesn't have to lean down as far while pedaling: less strain on the lower back, and when it's time to lean down to minimize drag, they're fine, but they can un-lean at any time to relieve their back and still have their hands securely on the handles. Maybe I'm wrong about all that (I'm not a cyclist), but long arms to height ratio is definitely an advantage in other sports like powerlifting and rowing! Not fair! Should have a trans division, just like other populations have unique sporting divisions (Paralympics, Senior Olympics, Special Olympics, plus all the smaller events throughout the year that cater to specific populations. There's even the Games (for gays, and I think they also include trans)