Instruct: Classify the given Amazon review as either positive or negative.
Query: Effective, but too extreme to stick to

I got this for post-pregnancy shape up. I had stayed active thru my pregnancy, working out several times a week. I tried this program to get back to pre-pregnancy shape & within 4 days had hurt my shoulder. (it does say at the beginning of the program if you have any shoulder issues NOT to use this) It is very heavy into the upper body work with the push-ups, pull-ups, etc. I can no longer do the workouts and am stuck with this expensive program now. Besides that problem, 90 minutes a day is just too much for anyone with a family or house to take care of.I hear Insanity is a much more do-able program.