Eating too much at dinner is not easy to digest, leading to fat accumulation in the abdomen, which will naturally grow into a small belly over time. If you are not particularly hungry, just eat 30% to 50% full. Drink some yogurt two hours after meals to help digestion. Half an hour after dinner, turn your back to the wall and hold your hips so that your hips, back, legs, waist, head and neck are as close to the wall as possible.