An erogenic aid is anything that improves performance of physical activities beyond normally achievable levels. Chemical substances that act as performance boosters are called ergogens. They include drugs taken to improve performance during competition or to increase recovery during precontest training (this enables athletes to endure higher training loads). Ergogenic aids are frequently thought of as drugs only, but they may also be mechanical (e.g. equipment); psychological (e.g. hypnosis and mental practice), physiological (e.g. oxygen therapy); or nutritional (e.g. carbohydrate loading and vitamin supplementation).




