Weight gain, or weight gain as it is called, can be achieved in three ways: healthy eating, sensible exercise, and improved lifestyle habits. Weight gain refers to the fact that energy intake exceeds energy consumption and excess energy is stored in the body, resulting in weight gain. If you want to gain weight, the first thing you need to do is to ensure that you consume enough protein, fat and carbohydrates, with a high-protein, high-calorie, easy-to-digest diet as the mainstay. You can consume sufficient staple foods, such as steamed bread, noodles, rice, etc., and eat more high-protein foods, as well as to ensure adequate daily intake of fruits and vegetables. Improve the diet at the same time, need to carry out appropriate exercise, in order to promote the body metabolism, help digestion and absorption. Aerobic exercise, such as running, swimming, climbing, etc., can be carried out to ensure that the amount of daily exercise and reasonable weight gain. In addition, maintaining healthy living habits is also very important for weight gain. First of all, to ensure adequate sleep, avoid staying up late, high-quality sleep can promote human growth hormone secretion. Secondly, it is also necessary to maintain a pleasant mood, avoid anxiety or too much stress, otherwise it is also not conducive to weight gain. It should be noted that if you are suffering from certain diseases, such as diabetes, hyperthyroidism, tuberculosis and gastrointestinal diseases, it is recommended to first treat the cause of the disease, remove the cause of the disease and then through the above methods to gain weight, do not blindly gain weight.