1. Don't exercise on an empty stomach: When the blood sugar in the human body is reduced on an empty stomach, it will cause dizziness, limb fatigue and even fainting. In addition, exercise on an empty stomach may cause hunger, abdominal pain, inhibit the secretion of digestive juice, reduce digestive function, and be prone to accidents. 2. Don't do a lot of exercise after meals: digestive organ activities need a lot of blood supply after meals, that is, to participate in fitness exercises. Because a large amount of blood flows to the muscles of the limbs, the gastrointestinal blood flow decreases, thus affecting the digestion and absorption of food. In addition, after the gastrointestinal tract is compressed by instruments or its own load, peristalsis is restricted, which is easy to cause mechanical dysfunction, leading to stomach cramps, abdominal pain, sweating or vomiting. Therefore, exercise usually starts after meals 1.5~2 hours. 3. Don't drink plenty of water during exercise: drinking too much water will cause stomach swelling, hinder diaphragm activity and affect normal breathing, which is harmful to the stomach and heart. Drinking plenty of water during exercise will increase the secretion of juice reflexively, which will make the body lose too much salt, leading to weakness and cramps in limbs. Some people are thirsty during exercise because the water in the oral cavity and throat mucosa evaporates, or the air is dry and saliva secretion decreases, which can be solved by gargling. In addition, male friends are specially reminded not to drink cold water during exercise. 4. Don't eat greasy or salty food: especially before fitness, don't eat greasy food. Because it needs more blood and the liver secretes a lot of bile to deal with these indigestible greasy foods, it will cause discomfort such as bloating, and the stomach will compete with the sports organs for blood. Don't eat salty food before exercise. Because it will cause dry mouth, citing a lot of water will cause bloating. At the same time, excessive salt will also make the human body tired and weak, and the heart rate will increase, thus affecting the exercise effect. I am used to eating a whole wheat bread and a 300 ml bottle of yogurt before exercising at night, resting for an hour, and then starting to exercise. I feel very good when I exercise. If you exercise in the afternoon, you can eat more carbohydrates at lunch, that is, the staple food, plus the same proportion of beef and vegetables, and then rest for two or two hours, and then exercise, and you feel good. I hope everyone can develop their own eating habits, so that regular fitness will get better and better. Through the above introduction, I hope that friends can take more vitamins and minerals in peacetime, ensure a reasonable diet structure and develop good eating habits, so that your discomfort in fitness will gradually decrease and the fitness effect will be more ideal.