How about just start up PE in the High Schools and colleges again?
Our colleges are insane enough about sports without giving them more excuses to push students to focus on it. And I have no interest in creating more positions for unionized do-nothing teachers in public schools. I don't think there's really much correlation between school PE programs and physical fitness, and it would take a drastic overhaul of the concept to change that -- like if you can't do X number of chin-ups by the end of the semester, you get an F. But there would be a million ADA-based challenges to any achievement-oriented PE programs, and it would just end up be another expensive, ineffective government-run mess.