Eat small serves of protein foods before and after each resistance training session to help promote muscle growth. Accept that an increase in food intake may cause bloating or gas. Be prepared to gain some fat as well. It isn't possible to increase muscle mass without also increasing body fat.
To maximize muscle growth, a clean bulk is better than simply eating high calorie foods. This may include a well-balanced diet of healthy fats, carbohydrates, and proteins. Some foods include chicken, shrimp, eggs, salmon, brown rice, quinoa, sweet potatoes, and fruits.