Want to gain weight, you can eat a moderate amount of higher calorie, protein, fat, carbohydrates and other richer food, while strengthening physical training. Need to achieve weight gain, mainly to make the intake of calories is greater than the consumption of calories, the human body opportunity to convert calories into fat hoarding, making weight gain. The most important thing to gain weight is to increase the intake of calories appropriately, choose some high-calorie foods, such as chocolate, eggs, panko, sesame seeds, nuts, etc., which have higher calorie content and higher fat content. Fattening also requires an appropriate increase in the intake of staple foods, which will also significantly increase calorie intake. At the same time need to properly increase the intake of protein, you can choose chicken breast, milk, seafood and other foods. Increase calorie intake at the same time can be appropriate physical training. Although physical training will consume calories, anaerobic training can also convert the intake of protein into muscle and enhance physical fitness. Proper physical training also improves appetite, boosts the functioning of the digestive system and increases the absorption rate of nutrients, which in a way also helps in weight gain. Maintaining a healthy weight is very important, and being too fat or too thin is not conducive to good health. It is recommended to keep the BMI between 18.5 and 23.9 for better health.