Described herein are nutritional supplements containing α-hydroxy-isocaproic acid and aspartic acid (e.g., DAA) and their methods of use in enhancing muscle performance and/or recovery after exercise. The nutritional supplements can be used to enhance muscle building and lean body mass, enhance muscle and physical performance, enhance recovery, and prevent catabolism (muscle atrophy or wasting) when administered to a mammalian subject.
