Sleep also enables the body to repair and replenish cellular material that is damaged or depleted. Important bodily functions such as the production of hormones, tissue growth and muscle repair, for ...

REM Sleep Behavior Disorder causes more than dream enactment—it’s a powerful clue to neurodegenerative disease risk.

The term REM was coined by researchers in the 1950s to describe the movements our eyes make while we're in this stage of sleep, which is now understood to be when our most vivid dreaming occurs.

Deep sleep is as important as REM when it comes to physical rest, so keep an eye on this stage if you're tracking your sleep patterns. Perhaps the most famous of the sleep cycles, REM sleep is ...

Sleep trackers — wearable devices that monitor all your vitals — provide detailed summaries of your sleep cycle so you know how many hours of REM, deep, and light sleep you're getting.

What’s happening varies depending on which part of sleep you’re in -- rapid eye movement (REM sleep) or non-REM sleep -- and even which stage of non-REM sleep you’re in. During the day ...

According to Healthline, if you’re aged 18–60 and are sleeping for 7–8 hours per night but are not waking up feeling refreshed, you may not be getting enough deep sleep, which enables REM sleep.

When you’re in a period of REM sleep, your eyes will rapidly move from side to side and that’s where the name REM (short for rapid eye movement) comes from. This is because when we fall asleep ...