[Supplement more protein for fitness] Protein is an important "building material" of the human body and one of the main components of muscles. The speed of protein synthesis determines the speed of muscle growth. Muscle growth requires a positive nitrogen balance, and in order to achieve a positive nitrogen balance, the body must have enough protein. The more muscle you grow, the more protein you need. Therefore, strength trainers should supplement 2 to 3 grams of protein per kilogram of muscle.
