It is better for women not to do running during breastfeeding for the following reasons: first, the whole body blood circulation is strong when running, the body consumption is high, which may lead to ligament muscle relaxation and uterine prolapse, which will also reduce the amount and quality of breast milk secretion. Secondly, when breastfeeding, you should pay attention to proper rest, increase nutrition, avoid getting cold and flu, and do light activities, such as practicing yoga and slow walking, to enhance the digestion and absorption of the gastrointestinal tract, help restore the body, which is conducive to the recovery of your own body, improve the secretion of milk and the quality of milk, and facilitate the normal growth and development of the baby. After the breastfeeding period is over, you can do intensity exercises such as running, playing table tennis and climbing mountains, which are good for your body to recover and strengthen your physique.