You can run to lose weight during breastfeeding, but the exercise should be moderate and try not to affect the amount of milk secretion and your own health. The main reasons for obesity during breastfeeding are excessive weight gain during pregnancy and excessive food intake after delivery to ensure milk secretion. Breastfeeding women can gradually start to lose weight about 2 months after delivery, but the method of weight loss should be scientific. When losing weight, it is necessary to pay attention to a balanced diet, adequate energy intake, and must not affect the quality and quantity of milk secretion. Running can promote body metabolism, accelerate fat decomposition, so as to achieve the purpose of weight loss. Breastfeeding women can also run to lose weight, but we should pay attention to gradual and orderly progress, and control the amount of exercise at the appropriate level. The breasts of breastfeeding women are bigger than usual, so they need to wear suitable underwear when running, as too tight can cause discomfort and affect lactation. Therefore, you can run to lose weight while breastfeeding. When discomfort occurs, you should consult a doctor in time to avoid delaying your condition.