Eat breakfast in the morning before exercise or after exercise, there are differences in different groups of people, can rest for a period of time to eat breakfast after exercise, you can also eat breakfast to wait for a period of time to digest food (at least half an hour) and then exercise to achieve a better exercise effect. Inappropriate exercise should be avoided as much as possible to avoid other adverse reactions. It is not recommended to exercise on a completely empty stomach, in the exercise will consume a lot of energy, human energy is mostly provided by the body’s fat, sugar and other substances, so exercise on an empty stomach may cause too little sugar in the body, resulting in hypoglycemia, palpitations, sweating, dizziness, nausea, and even coma. It is also not recommended to exercise vigorously after eating too much, because blood flows to the limb muscles during exercise, and less blood flows to the stomach, which may have an effect on the stomach’s digestion of food and drink. Because of the limited blood supply, too much blood is transported to the limbs and stomach, and the blood flowing to the brain is reduced, so dizziness, headache and other brain hypoxia may occur. In addition, it is recommended to take some sugar in moderation before exercising in the morning to avoid hypoglycemia when exercising, and pay attention to a good warm-up. Try not to do too strenuous exercise in the morning, you can properly do some jogging and other aerobic exercise, which is good for your health.