Breastfeeding refers to the period of postpartum breastfeeding. Breastfeeding itself is a way to lose weight. Breastfeeding can promote contractions, consume calories and promote maternal metabolism, which is an energy-consuming process. Postpartum need to do some recovery exercise, even if it is not for the purpose of losing weight, such as the exercise of contracting levator ani, which is the common saying, once 15 seconds, and do several cycles a day as appropriate, which can promote the recovery of pelvic floor muscle function. It is not advisable to do too much physical activity or strenuous exercise during the puerperium, and it is mainly soothing and gentle, such as yoga, aerobics and aerobic jogging during the puerperium. Gradually start strength exercise, mainly to exercise muscle strength, step by step, and adjust exercise intensity according to physical condition.