The morning fasting exercise can not be generalized, the advantages and disadvantages, need to be judged according to the appropriate people. Most people do not cause discomfort in the morning fasting exercise, and health benefits, but some people in poor health if fasting exercise, may be harmful to health. 1, the benefits: good health of people in the morning fasting exercise can make the rest time more regular, can enhance hunger, conducive to the good habit of eating breakfast, but also to promote blood circulation in the body, to maintain energy, and Quick thinking. The body reserves less sugar in the morning fasting state, compared to non-fasting exercise body fat burning efficiency will increase, which is conducive to weight control; 2, disadvantages: such as diabetic patients, poor health and liver glycogen reserves less people, after a night of metabolism, the body needs to replenish energy, the morning fasting exercise will accelerate sugar, fat and other energy consumption, if the energy supply is insufficient, it is easy to dizziness, weakness If the energy supply is not sufficient, it is easy to have dizziness, weakness, shortness of breath and other hypoglycemic symptoms. Therefore, the above-mentioned people are not recommended to exercise on an empty stomach, and it is recommended to replenish energy appropriately before exercising. In addition, it should be noted that the function of the tissues is not fully activated after waking up in the morning, and the amount and length of exercise should be appropriate when exercising on an empty stomach, subject to no pain during exercise and no fatigue after exercise. If you choose to eat some food and then exercise, it is not recommended to eat too much or exercise immediately after eating food to avoid stimulating the stomach and intestines, causing vomiting or gastrointestinal cramps and other symptoms.