Belly will cause many diseases and must be reduced. You can do sit-ups, hula hoop, do yoga, or beat your pulse. The pulse is located at the thinnest part of the waist. You can pinch, knead and lift the pulse with both hands from the front and back directions. Mainly convenient, anytime, anywhere. Eat a reasonable diet, be full at seven minutes every meal, and don't sit for half an hour after a meal.