This is because the fat in the body has been transformed into other components, just like a large piece of fat and a small piece of lean meat. They are different in size but the same in weight. Fat people occupy a large part of the body, look fat and their skin becomes slack. After exercise, their skin becomes tight, and the fat is still in the body, which is transformed into something else. It seems that the whole person has lost a circle. That's the truth. Maybe it's just some grease in the viscera of thin people, such as stomach contraction and intestinal oil in the small intestine. When dieting, you'd better cooperate with some exercise. If you don't have time, you can mop the floor every night. That's what I did, and it still has some effect.