Achmad Agus Ilyas – stock.adobe.comResearchers highlighted three essential amino acids that are building blocks of protein — methionine, isoleucine and valine. For people who don’t exercise regularly, high levels of these amino acids may keep certain growth-related processes constantly active. Longer-term human studies are still needed to determine whether these metabolic benefits ultimately translate into increased lifespan, they noted. Drazen – stock.adobe.com4 For people who don’t exercise regularly, high levels of these amino acids may keep certain growth-related processes constantly active. Exercise helps to direct dietary amino acids toward building and repairing muscle instead of leaving excess amino acids to be processed by the body, the researchers noted.