The practice is: the legs should be straight (if the legs are not straight, the abdomen can be reduced), so that the thighs can be stressed. In fact, many people ask me why I only do 30. There are two reasons. The first reason is that it is easy to build muscles by doing too much. The second reason is that in the process of doing it, even if I can easily complete the action, I should try my best to exert myself on my thigh, which is enough. Lose about 2cm a month, don't worry. But if you press the abdomen and buttocks at the same time, you can reduce the abdomen and buttocks, and the effect is more obvious than the thigh. Of course, the point is to stick to it and do it every day! If you are really overweight, you need to lose weight. In fact, XXXX is better in slimming, and the effect is actually very good, but the price is generally unacceptable.