The key to getting good sleep is understanding how it works. But it's a complicated thing. And, while we usually hyperfocus on sleep duration, counting the hours of rest we get and assuming the ...

However, some research shows that major stressors may increase REM sleep but reduce deep sleep. REM rebound, which is when we ...

If you're dealing with sleep deprivation or are already feeling the side effects, it's helpful to know the stages first. Below are the warning signs of sleep deprivation and what to do about it.

On a good night, we cycle four or five times through several stages of sleep, each with distinct qualities and purpose—a serpentine, surreal descent into an alternative world. Wile, the seven ...

Sleep latency: Also known as stage one sleep, this is how long it takes you to fully fall asleep. Contrary to popular belief, it’s not healthy to drop off to sleep immediately — that’s a ...

No single theory can fully explain dreams, but we do know that they are closely related to the stages of sleep. There are four stages of sleep: light non-rapid eye movement (REM) sleep stages 1 ...