I'll be 70 in February, have low testosterone and play basketball in Porto 4-5x/week with guys 15 to 50 years younger than I am. This includes one local league team with a coach who invited me to train with this team. I regularly shoot their lights out and my nicknames are "sniper" and "o profesor do basquetbol" (and grandpa).

The cultural panic over trans athletes is an expression non-athletes' ignorance of a simple fact: in many sports software often beats hardware. Teenage players with awesome physical gifts regularly make dumb mistakes and expend enormous physical effort with low yield due to lack of court sense and impulse control. If time travel were possible, and I could play the me of 1975, he wouldn't stand a chance.