Increase muscle growth

The BCAA leucine activates a certain pathway in the body that stimulates muscle protein synthesis, which is the process of making muscle. In one study, people who consumed a drink with BCAAs after their resistance workout had a greater increase in muscle protein synthesis compared to those who consumed a placebo drink. 

Leucine helps maintain muscle tissue by managing nitrogen balance, the body is supplied with energy even during exercise, and muscle glycogen is conserved to be used for muscle contraction.