If I were the Emperor of Schools, I think I would require that all students participate in some physical activity for at least half hour per day. If they participate in an active interscholastic sport, that could count toward the requirement. Otherwise, they could choose from a laundry list of activities including intramural sports, walking, running, swimming, weightlifting, calisthenics, martial arts, yoga, or anything else that the PE teacher deemed suitable. Scheduling would of course depend on the available facilities, and would have to be integrated into other classes. Teachers' aides would monitor the participation, intensity, and time.
The real challenge would be allowing time for preparation and cleanup, which is why I suggest only half-hour.