Yeah physical activity is just part of our bodies.

I used to do taichi/noob-wushu in college. It's a funny "sport" because it's oh so smooth and slow but it makes use of so many forgotten muscles that I left my first session drained. I never got high on weed, but that afternoon I was high as fuck.

Some schools experimented doing some taichi first in the morning. Lots of kids said they felt better, calmer and more focused mentally.