Have you lost a lot of weight and have you lost most of your stomach and legs?
The game challenges you, yes. However, I can't tell you whether this will help you lose weight, because I do sports on the side and don't want to lose weight either. I also think that the game demands stamina and fun and replaces small workouts
You have to test whether you lose weight with it.
The game is nice and exhausting, if you pay attention to your diet you will lose weight. But you can't determine at which points you lose weight.