I completed the 10 week training a few months back. I lost 40 pounds. Went from a very chubby 285 down to 245 and a waist of 40 down to 36. I just started it up again this week. Trying to get to 220 and some muscle definition. I by no means can keep up and do all of the moves. When I find myself exhausted, I would just do mountain climbers or high knees to keep moving. This time around, I am going to concentrate more on the upper body workouts. Trying to get rid of the man boobs! HA Once I complete the training this time around, I might get P90X. Depends though since I feel that Insanity does a lot for your muscles without having to buy any weights/bands/pull-up bar. It has done wonder for my golf game but lightened my wallet since I had to get a whole new wardrobe!!!!! HA