You do not have to be an Olynpic athlete to wear sportswear, in fact you don’t even have to do any kind of sport. I personally do not do a lot (I know, shame on me) but I walk (Yes people, in Los Angeles walking for more than 3 hours several times a week is a sport).
MPG just released their Fall collection for men and women. A lot of their pieces are very urban so you can still go to the gym amd look stylish.