- make me spend quite a lot of time on something exercise-related (since it was "opposite shift" of regular school classes)
- had me do next to zero actual exercise
- teach me literally nothing about how exercise or training works
- make me hate everything related to exercise for quite a few years
Worse than a waste of time, it was actively harmful.
I feel good with at least 4 hours a week of bodyweight training plus some cardio.