It is useless because there is no scientific basis and slimming principle to follow.

The specific reason is that there is no local slimming. Intelligence temporarily causes local deformation of human body through external physical oppression, but has no substantive effect. Fat needs to go through a series of chemical reactions in the human body before it can be decomposed.

Therefore, if you want to lose weight in a real sense, you need to control your daily diet and increase moderate exercise.