Bit tongue in cheek here. Maybe we should approach sport and equality the same as horse racing. I looked into this and well gosh
There are filly’s , colts, mares, stallions and geldings. Sometimes filly’s have their own maiden races but the upshot is that an experienced horse race are mixed sex racing. But they are handicapped according to sex age and performance ie weighed down to make the race equal.
so maybe that’s the answer put weights on the boys ankle to slow him down, if he has won loads of meets weigh him downs some more.
thinking about it it would work in running, swimming, cycling, darts ( on the arm i guess) the options are endless
if i had an encounter with a trans on sport this is what i would say