Physical reserve is a university question. Of course, this is related to a player's natural physical condition, but it can't be changed the day after tomorrow. Aside from technical drills and topics, the most important part of football training is to restore physical fitness and strength training through a lot of exercise. Especially at the beginning of the season, various warm-up matches and teaching matches will be interspersed between high-intensity training. Don't do too much muscle strength training at this time, mainly to restore physical fitness and reserve physical fitness. After the physical fitness can cope with the mid-season competition, we should often add muscle strength training, otherwise it will cause muscle strain and injury. Secondly, we should pay more attention to diet. For a real example, Zhang of Evergrande had a trial training in Inter Milan more than ten years ago. Before that, he was in poor health and always had diarrhea. After coming to Italy, the physical fitness coach and nutritionist of Inter Milan specially made a menu for him, but he didn't accept snacks such as melon seeds, preserved fruits and beef jerky that needed to be digested by himself. He was forbidden to drink carbonated drinks and eat simple Italian meals: vegetable salad, a small amount of steak and beef jerky. In short, athletes must eat less! A month later, he has basically no physical problems to play the whole game, the problem of diarrhea has been completely solved, and the muscle strength of his legs has also increased significantly. This is the gap between China football and the world powers.