Running as little as possible during breastfeeding to exercise the pelvic floor, recovery, otherwise it is easy to cause uterine prolapse, reduce milk secretion and increase the risk of colds. 1. cause uterine prolapse: women in breastfeeding, it is best to reduce abdominal pain, plus abdominal pressure, running, there is a risk of uterine prolapse. 2. Affecting milk secretion: when women run during breastfeeding, the energy consumption is relatively large for the organism, and there will be a lot of sweating, which may lead to a decrease in milk secretion. 3. Increase the risk of catching a cold: because of the increase of blood circulation in the whole body during running, the body tends to sweat a lot, and if you don’t pay attention to keep warm, it may lead to catching a cold, and after a breastfeeding woman catches a cold, it may have a bad effect on the baby. So women try not to run during breastfeeding, if you want to exercise, you can choose some moderate intensity soothing exercise, such as yoga, walking and so on.