Is the plastic belt useful or not? Conclusion: Plastic belt can not help to reduce fat, but is harmful to health. Too tight a belt will increase perspiration during exercise. This is because the heat of the binding part is not easy to dissipate. In order to balance the body temperature, the body will automatically increase the degree of sweating. The weight loss caused by body sweating is short-lived, because after all, there is a healthy limit, and diet and water supplement need to return to the original balance. Therefore, they are not involved in the process of fat metabolism. Moreover, long-term use seriously affects the metabolic function of the skin, increases the probability of skin diseases, and increases unnecessary water loss of the body. If the belt is too tight, it will oppress internal organs. These are harmful to health.