In China, many people have the habit of exercising early in the morning, which has been our traditional habit for a long time. However, as time goes by, there are many voices questioning this habit, especially for patients with cerebrovascular diseases, and it has been denied. From a medical point of view, the morning is not the best time to exercise. In particular, patients with cardiovascular and cerebrovascular diseases and middle-aged and elderly people should not exercise in the early morning. Medical doctors have found that the onset of cardiovascular and cerebrovascular diseases and the time of death of patients are closely related to the early morning. Steps / methods: 1, early morning running has can directly lead to cardiovascular embolism, while the evening running is only beneficial to health. A good number of scholars have done some experiments on this, they have conducted morning running and evening running respectively for the people who participated in the experiment, and analyzed the blood, the results show that morning running increases the possibility of blood clots in the blood vessels, so patients with cerebral thrombosis must not exercise in the morning. 2, in now, the air quality is obviously decreasing, and in the morning, especially when the sun is not out, there will be more suspended matter in the air, so it is unwise to choose to come out for morning exercise at this time. In addition, the body’s functions are still recovering after waking up, and the blood viscosity has increased, so the possibility of blood clotting increases. 3, the human body after a night’s sleep, the body’s water with the respiratory tract, skin and stool and so on loss. This makes the body’s water metabolism is not enough, so the whole body’s tissues and organs and even cells are in a state of water loss, because of the loss of water, the blood in the blood vessels will also become sticky, and therefore prone to thrombotic infarction. Note: Patients with cerebrovascular disease should not exercise in the morning, but it is not that they do not exercise, but to choose in the late afternoon or evening. Try to choose as much exercise as possible, such as walking, jogging, brisk walking, taijiquan, aerobics, etc., remember not to engage in strenuous activities.