How long does REM sleep last during a typical night’s sleep?
REM (Rapid Eye Movement) sleep is one of the five stages of the normal sleep cycle and is the most important sleep stage for learning and memory. During REM sleep, your body and brain are highly active and your eyes move rapidly in all directions. It usually takes up to 90 minutes to get through the REM cycle and can last anywhere from 10 minutes to an hour, depending on how long you have been asleep. It typically happens around every 90 minutes in a typical night’s sleep.