I am in good shape and really love it- but you do have to give it your all (though it is only 25 mins, so that adds motivation)! My husband was in horrible shape, but really tried hard using the modifying moves and lost a ton of weight and also loved it. If you watched us doing it, you would think we were doing different videos since our ability levels are so different, but we both got amazing results and enjoyed it. I definitely recommend.