420 days after delivery, women's uterus and body have recovered almost. At this time, they can do running and fitness exercises. However, when you first run, you should do it step by step. Don't run for a long time at the beginning and keep the speed too fast, which is easy to cause physical exhaustion and fatigue. During running exercise, pregnant women should arrange the running intensity and exercise time according to their own specific conditions. Women who give birth naturally can get out of bed about three days after delivery, so they can do some light exercise a week later. These exercises are conducive to the recovery of the body and the improvement of immunity.