First, drink a large glass of warm water before running. Because after a night's sleep, more water is lost in the human body. When people sleep, the skin and respiratory tract will excrete about 20 ~ 35 grams of water every hour, and coupled with the discharge of urine, the body will be in a state of relative water shortage. If you don't have the habit of drinking water in the morning, the blood will be sticky and slow, and it is easy to form a thrombus, which will lead to a significant reduction in blood volume, chest tightness, palpitations, dizziness and other discomfort, and even lead to myocardial infarction. For the sake of health, everyone should drink a large glass of warm water as soon as possible after getting up. At this time, intestinal mucosa can quickly absorb water into blood circulation, effectively increase blood volume, dilute blood, reduce blood viscosity and promote blood circulation, thus preventing angina pectoris, myocardial infarction, cerebral hemorrhage, cerebral thrombosis and other diseases.
Besides, you should run for 20 minutes after drinking water. Long-term running on an empty stomach may lead to diseases such as "cross-breath" and stomach trouble, and also help to remove metabolites from the digestive tract and accelerate the discharge of toxins in the body.
Second, it is not advisable to do a lot of exercise on an empty stomach. The energy stored in the human body can only guarantee 90 minutes to two hours of exercise, not too intense. If the fitness distance is long, you can drink a small glass of sugar water or eat less snacks first. If you feel uncomfortable during exercise, you should stop exercising immediately and replenish some energy.
Third, it is necessary to make it clear that breakfast must be eaten whether you do morning exercises or not, but when to eat it is particular. When people are on an empty stomach in the morning, the bile in the gallbladder is stored for about 12 hours every night, which makes the gallbladder full, with greater pressure and higher cholesterol saturation. In the case of normal breakfast, due to the contraction of gallbladder, cholesterol is excreted with bile, and food stimulates bile secretion, which leads to the decrease of cholesterol saturation in bile remaining in gallbladder, thus making it difficult to form stones. If you don't eat breakfast, because the fasting time is too long and the gallbladder is full for a long time, it is easy to induce chronic cholecystitis, and the bile in the gallbladder is stored for too long, which leads to the oversaturation of cholesterol in the bile, which in turn leads to the deposition of cholesterol and the gradual formation of stones.
Of course, if you don't meet my initial hypothesis, have a history of heart-related diseases, diabetes or hypoglycemia, or are the elderly, you can properly replenish energy before morning exercise and eat some foods rich in carbohydrates, such as bread, milk, honey water and bananas. If there is no energy as a guarantee, don't do strenuous activities in the morning exercise, control the amount of exercise and avoid consuming a lot of energy. Of course, eating too much food is also unfavorable. The digestive system function of middle-aged and elderly people deteriorates, gastrointestinal peristalsis slows down, and the digestion speed of food in gastrointestinal tract slows down, which makes it easy to stay. At the same time, running after a full meal will increase the burden on the stomach, increase intestinal peristalsis, have pain in the abdomen, and induce pancreatitis and appendicitis to some extent.