Usually eat more high-calorie and high-fat foods, such as cream, chocolate, chicken legs, steak and other foods with high sugar content, and maintain adequate sleep and a happy mood. Don't stay up late, eat more nutritious food, eat less and have more meals, and don't have any psychological pressure and too much psychological burden. As the saying goes, you can eat foods rich in protein, such as meat, eggs, fish and bean products, because protein is an ingredient. When cooking, add some seasonings such as onion, garlic, pepper and monosodium glutamate to increase appetite. You can also add 1 cup of milk, or 1 egg or some snacks between meals, but it will be counterproductive to add meals regularly. Exercise, enhance physical fitness, you can often do swimming, boating, skating, cycling, doing exercises, running and so on. Improve the function of internal organs. After doing this aerobic exercise, you can do push-ups, usually 8 ~ 12 groups and 3 ~ 10 groups at a time, depending on your personal situation. This can exercise the upper limb muscles. Enhance appetite, promote nutrient absorption, make your body stronger and keep your heart happy. You should also ensure enough sleep, don't be too tired and keep a good mood. Exercise more at ordinary times and wish you good health!