I've done this, but it's just a combination of Billy, Duoyan Zheng and spinning in the gym of American boot camp ... I'm not very fat, and I'm not trying to lose weight. At most, it's shaping ... You can't jump straight, you need to combine various exercises to help shape in all directions ... You can arrange your own schedule in one week, and the effect of interspersed combination will be much better ... Wang Ying, her movements are very soft, and the effect is not as good as Billy's, but Billy.