Having just done this video for the first time, there is no doubt it is going to work. However I would not definitely recommend it for beginners. There is very little information from the instructor regarding technique, ways to maximise exercises and how to prevent injury. The moves are basic and quite repetitious and include a few strange strengthening exercises. Now I know what a dog must feel like! There is both aerobic (jogging and not much else) and toning exercises which makes it a good work out. However she does move quickly through the moves but I think this will be fine if I do it a few more times. On the other hand, I wont be buying any more Firm videos.