Many things go into getting a good night’s rest — including getting enough deep sleep. While “deep” and “quality” sleep might sound interchangeable, deep sleep is actually one of the four sleep stages ...

Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is crucial for numerous bodily functions. But how to increase deep sleep isn’t ...

Waking up feeling groggy is a pretty lousy way to start the day. Getting more deep sleep can help you feel more refreshed, sure. But exactly how do you do that, especially if youre a notorious ...

Like many Americans, I know I need more sleep. I’m a night owl, often writing late into the night, but also a mom who gets up early with her kids. The result: I’m not getting enough rest. When I ...

It can be tough to calculate exactly how long you’re in REM, but many health trackers use your heart rate, heart rate variability, and data on your movements to make solid estimations. (Just know that ...

"I can’t fall asleep without a glass of wine." Can you relate? As a sober therapist who quit alcohol after drinking to fall asleep for over a decade, I completely understand. Worrying about lost sleep ...