Every morning running time, it is recommended that the best time to run in the morning should not exceed half an hour. Because the blood pressure will be high in the morning, the pressure of blood on the blood vessel wall is a relatively high point in the day, which will increase the incidence of many diseases, including cerebrovascular disease, cerebral hemorrhage, cerebral infarction. So the morning exercise time should not be too long, the exercise amplitude should not be too strenuous, or smooth and slow, to walk, aerobic exercise, jogging is best. Time should not exceed half an hour, because too much exercise on human nutrition is very big. There are also different requirements according to the population of exercise is young, elderly or middle-aged, with or without underlying diseases such as hypertension, diabetes, coronary heart disease, so the morning exercise or be cautious.