The flagship female-dominant sport seems to be women's gymnastics... Which is actually dominated by juveniles. Though I wonder... Would a twenty year-old man doing a floor routine have a thrust-to-weight-ratio advantage over a thirteen year-old girl?
Hm.
What about ballet? It's not a sport, but it is a demonstration of physical prowess, where excellence is highly esteemed. It's also co-ed, with male and female performers sharing the stage and performing alongside each other. Does ballet choreography take into account the physical differences between the sexes? Or does that difference get erased by the extremity of the selection process?