Weight and strength training is one aspect, followed by dietary advice, supplementing high-calorie and high-protein foods. Such as beef, chicken breast, egg white, etc. Muscle growth has three elements, namely, training, nutrition and rest (recovery). Therefore, it is necessary to ensure a good rest after each training, which will achieve better results for muscle recovery and regeneration.

Extended data:

The method of fattening:

Drink another bag of milk before going to bed every day;

Eat more snacks during the day (chocolate, biscuits, puffed food, cakes, sweets and fried food are recommended);

Replace steamed bread and rice with bread, biscuits and cakes;

Eat more staple food and meat, and less vegetables and fruits.

Eat more solid food and less liquid food (such as porridge, noodles and soup). );

Eat midnight snack every day, eat at home if you don't eat outside;

Replace boiled water or mineral water with drinks or beer;

Reduce activities and don't stay up late;

References:

Baidu encyclopedia: gain weight