Dear Yosef Johnson,
1. You mentioned that the exercise should not be done after intensive jump exercises etc. Should they be done on a different day or later in the same day?
I think that Glute Ham Raise must be included in the General Physical Preparation program and must be used in the training stage that precede the specific work, as intensive jump exercises etc.
2. Should one ever use maximal effort [2-3 reps]with this exercise? What is the highest intensity you would recommend?
I think that Glute Ham Raise is a general enforcement exercise that must not be performed with maximal effort and, generally, with high intensity.
Yuri Verkhoshansky