Is overtraining a result of too much muscle destruction coupled with not enough rest/recovery or can overtraining occur due to too much muscle destruction alone? It would seem to me, at least intuitively, that if muscles grow by being damaged and then re-building so as to handle that same resistance load again without being damaged, then as long as one gets enough rest/recovery, theoretically overtraining wouldn't be a result of say too many sets or excersises. Thoughts?