This is a good workout for someone who is familiar with yoga; it is not for those who think that yoga is 'easy' and not strenuous. Having practiced yoga for several years, there were still parts of this workout that were very difficult to sustain. That being said, it is helpful to have the workout separated into segments so one doesn't feel compelled to complete the whole thing at once. It's perfectly OK to complete one or two segments, rest and do the remaining segment another time (or even another day). I have found that doing one and segment and following it with a segment of a Dancing With The Stars DVD is a great workout for both strengthening and cardio. Time will tell if the weight loss occurs.