The best time for postpartum belly recovery is within three months after delivery, especially within 42 days after delivery. Because after the birth of a baby the belly of the mother will be relatively large, the cause of this situation is mainly due to the flaccid belly, when the pregnant uterus obviously enlarged, the belly will also be extremely dilated, which will lead to a decrease in the elasticity of the skin. If you can reasonably control the diet, appropriate activities and exercise after giving birth, the belly recovery will be the fastest. It is not suitable for strenuous exercise at this stage, but it is okay to do abdominal muscle exercises and sit-ups, etc. It is recommended to eat a light diet, eat fewer meals, eat less greasy and hard-to-digest food, and get out of bed every day. 42 days later, you can start doing sit-ups and other abdominal muscle exercises, which can be done at a professional postnatal rehabilitation facility.