Medically reviewed by Sanja Jelic, MD As we sleep, our brain moves through four stages and two phases: non-rapid eye movement ...

Time to give these so-called sleep hacks a rest? The team behind the sleep tracker Sleep Cycle crunched data from over 1 million global users to determine the social media slumber shortcuts that ...

A new study reveals that not getting enough of specific stages in the sleep cycle may be linked to cognitive decline and ...

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 ...