Pregnant women are encouraged to maintain a certain amount of daily exercise when their physical condition allows it, i.e. when there are no contraindications to exercise during pregnancy. The safest and most convenient exercise for pregnant women is walking, and walking is suitable for almost all healthy pregnant women. Pregnant women can adjust the intensity of walking according to their own physical qualities, in order not to overdo it, which is conducive to the physical and mental health of pregnant women and the development of the fetus. 1, weight control: proper exercise can make the nutritional metabolism of pregnant women reach a balance, to avoid excessive weight gain during pregnancy, excessive fetal weight, causing huge children, resulting in difficulties in childbirth; 2, reduce blood sugar: pregnant women with gestational diabetes, pay particular attention to walking after meals, which can reduce postprandial blood sugar. Can reduce blood sugar after meals, so that blood sugar control in the normal range, reducing complications of gestational diabetes; 3, enhance cardiopulmonary function: increase pulmonary ventilation, improve lung capacity and myocardial oxygen tolerance, prevention of cardiovascular disease during pregnancy; 4, increase vascular elasticity: pregnant women with gestational hypertension disease is also recommended moderate walking exercise, exercise can promote blood circulation throughout the body, increase vascular elasticity, on 5, increase the psychological comfort: appropriate outdoor exercise can relax and relieve stress, keep a happy mood, increase the confidence and happiness of pregnancy; 6, promote the fetal head down: late pregnancy can help the fetal head down, relax the pelvic ligaments, making delivery easier. It is important to note that walking is not the more the better, and you need to avoid too much exercise, which causes discomfort and strain. Generally, before 13 weeks of pregnancy, the main focus is on fetal preservation and additional walking exercises are not recommended. Between 13 and 36 weeks of pregnancy, 6,000-8,000 steps of exercise per day is recommended. After 37 weeks of pregnancy, it can be increased to 10,000-15,000 steps per day. For pregnant women with gestational diabetes, walking 20-30 minutes per day after 3 meals is recommended.