Weights Aren't Enough

Diet and sleep are also important factors in muscle growth. You need an additional 250 to 500 calories per day to fuel muscle growth. A protein intake higher than average also gives your muscles adequate amino acids to assist with repair. Aim for between 0.55 and 0.7 grams per pound of body weight daily. You'll need seven to nine hours of sleep, which is when your body releases human growth hormone for muscle growth.