what type of sleep do you need the most of
Sleep Sleep is divided into two broad types: non-rapid eye movement (non-REM or NREM sleep) and rapid eye movement (REM sleep). non-REM and REM sleep are so different that physiologists identify them as distinct behavioral states. Non-REM sleep occurs first and after a transitional period is called slow wave sleep or deep sleep. During this phase, body temperature and heart rate fall, and the brain uses less energy.[5] REM sleep (also known as paradoxical sleep), a smaller portion of total sleep time and the main occasion for dreams (or nightmares), is associated with desynchronized and fast brain waves, eye movements, loss of muscle tone,[1] and suspension of homeostasis.[11]