As being an athletic person myself I must say my health hasn't declined after using anything. Just don't smoke cigarettes, that's shit.
Coke, xtc, mdma, shrooms, 2C-B, valium, whatever. Just stay away from meth, speed, heroin and that kind of shit that kinda ruins your life, i guess.
It's all about regulation, all the other media talks are weak shit.
These kind of experiences are only suited for those, who are capable of handling them.
But remember kids, don't do drugs!