Your nightly sleep cycle plays a key role in the quality of your sleep. Here's what happens in each stage and why it matters ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Smart mattresses connect wirelessly to apps or remotes and allow you to customize some aspect of the ...

I f Daylight Saving Time leaves you feeling discombobulated, you're not alone. Doctors report a 24% spike in heart attacks ...

Stress. Anxiety. Noisy neighbors. Blanket-hogging partners. With the list of things that can disturb a person’s sleep being more of a scroll, it’s no wonder an estimated 50 to 70 million Americans are ...

Researchers trace how different sleep stages may fine-tune what we remember, trading specifics for more general knowledge.

All the Latest Game Footage and Images from REM Cycles One night, ten people fall asleep and find themselves in someone else’s dream. Guide these unlikely heroes as they traverse strange lands filled ...

REM sleep is a stage of sleep when your heart rate increases, your blood pressure elevates, and your brain processes emotions ...

Peloton instructor and yoga teacher, Chelsea Jackson Roberts, speaks to Good Housekeeping about the importance of exercise ...

Learn how scientists discovered that even in deep sleep, parts of the brain stay active, and the mind may never fully rest.