Sports dietotherapy: What nutritious food can you eat before long-distance running to increase your physical strength? This problem belongs to the category of sports nutrition, not dietotherapy.

For this problem, we must first grasp carbohydrates, that is, "sugar." (1) Pay attention to macromolecular sugar in training, that is, rice flour. Grasping low molecular weight sugar and glucose in the competition. (2) Pay attention to replenish water to prevent dehydration from affecting physiological functions. If you exercise for more than an hour, add some salt to the water. (3) Pay attention to the supplement of vitamins and minerals, mainly from fruits and vegetables.

Keep a normal diet and pay attention to the above three points. The key to the problem is the supplement of "sugar" and "water".