The Branched Chain Amino Acids (BCAAs) Leucine, Isoleucine and Valine are valued by all types of athletes. Studies have shown that these essential amino acids can help with muscle recovery, but findings vary. A review of controlled trials published in the journal Nutrition takes another look at the potential of BCAAs. 

Analyzing 8 different studies, researchers came to the conclusion that BCAAs can reduce creatine kinase for up to 24 hours. Levels of this enzyme become elevated after exercise-induced muscle damage. This suggests that supplementing with BCAAs is better for exercise recovery than rest alone.