I read the previous paragraph. The movements are basically the same as the aerobics I jump in the gym, so it should be considered aerobic. It is ok to lose weight, but the effect of this kind of thing is not as good as other sports, such as running and spinning. This kind of exercise is to reduce the whole body. As long as you relax after practice, stretching muscles will not grow muscles. As for how long, I don't know. Generally speaking, it is not enough to lose weight just by jumping.