[harrierpigeon]

I have properly clinically diagnosed ADHD- for me in HS there was a definite correlation between time spent exercising and grades- when the sports season ended, there was almost always a dip in my grades from tests and the like two weeks later. Call it anecdata if you will, but there's got to be at least some sort of correlation between exercise and mental state- I doubt it's just a thing for people with ADHD, either.