1, before exercise 1 hour. This is to avoid digestive dysfunction caused by physical activity. Similarly, avoid eating indigestible foods, such as juicy vegetables and fried foods. 2. Add water every 10- 15 minutes. The best choice is to go to light salt water and avoid drinking ice water, which will hinder the body's calorie metabolism rate. 3, eat less and eat more meals, eat more eggs, milk and meat in moderation. The daily diet is: protein is moderate, with low fat and high carbohydrate. The ratio of the three main nutrients should be about 25∶20∶55.