Many of the world’s greatest athletes eat, sleep, breathe, and live for their sport. But did you know that in addition to physical conditioning and conscious eating, sleep plays a major role in athletic performance and competitive results? The quality and amount of sleep athletes get is often the key to winning. REM sleep in particular provides energy to both the brain and body. If sleep is cut short, the body doesn’t have time to repair memory, consolidate memory, and release hormones.