While many of us may be guilty of trying to claim back some z’s during lunchtime naps or a quick 30 minutes snoozing on the sofa after work, we’re still likely missing out on deep sleep.

Sleep can be divided into 2 phases — non-rapid eye movement (NREM) and rapid eye movement (REM) — and 4 stages that make a complete cycle. You’ll typically complete 4 to 6 cycles per night.

It might be worth working a little bit harder to get that much-desired, but often elusive, good night's sleep. Deep sleep clears the mind of waste just as a "dishwasher" cleans dirty plates and ...

Danish scientists found that a molecule called norepinephrine plays a key role in brain cleaning in mice. During deep sleep, ...

“If I’m remotely anxious, my sleep is trash. If you’re in the same boat right now, try these three things tonight. It’ll buy you at least 90 more minutes ... agree that deep sleep is ...