all fair points but one final thing I would say is that taking a hit from someone going for you is an important part in training. That's why you always see that scene where the young padawan or trainee etc is beaten by the old Master.

In fight choreo getting really hit means everyone slams on the breaks immediately. It's no good knowing all the moves if the moment someone is on par with you you've never experienced taking a hit before — no matter how much protein and reps you do.