Researchers at UT Health San Antonio recently explored a possible way to make exercise more rewarding for older adults. Their study investigated whether a nutritional supplement called branched-chain amino acids, commonly known as BCAAs, could help reduce fatigue and improve the benefits of exercise. Jason O’Connor, PhD, an associate professor of pharmacology involved in the study, says that inflammation can spur changes that may contribute to central fatigue, a type of exhaustion that originates in the brain rather than in the muscles