A decrease in circumference but no change in weight may be due to a decrease in fat but an increase in muscle, which can be compared by measuring body composition before and after weight loss. A decrease in body circumference such as waist circumference and hip circumference but no change in body weight may be due to the fact that after exercise, fat is consumed so that the circumference decreases but the muscle content increases and the muscle density is greater than that of fat, so there may be an increase in body weight. Weight loss does not require the pursuit of weight loss, in fat loss at the same time to increase muscle is a healthier way to lose weight, both to maintain health and improve body shape. Circumference is small but weight gain may be a normal physiological phenomenon, if the body appears to be uncomfortable, it is recommended to go to the regular hospital in a timely manner.