[freebish]

It depends on your definition of "excess", I guess.

If you work out in the cardio section of any gym, you will eventually see regulars who are hitting some machines very hard, with a visual appearance of anorexia. I'm sure some of those people were just skinny, but not all of them. It's not my role, as a fellow gym member, to recommend psychiatric help. But heavens knows I thought it, more than once.

In addition, gyms are built around luring in people while assuming that a large percentage of them will quickly stop attending. Some of the drop-off is just from laziness or dislike of exercise. But some of the drop-off is from going too hard, too fast, resulting in injury, especially for first-time weightlifters.

[blacksmith_tb]

That's fair, I wasn't considering psychological problems (it would remain to be seen if borderline-OCD exercising had negative or positive physical effects, though). Along similar lines there's 'bigorexia'[1]

1: https://en.wikipedia.org/wiki/Muscle_dysmorphia