What is core sleep is on your Apple Watch, and does it even matter? We look at which sleep stages matter most for quality ...

Few experiences rival the calm satisfaction of falling asleep easily and waking up feeling fully rested. But sleep is more than a luxury or idle downtime, it’s a vital biological process that supports ...

You’ve heard of REM sleep but what about deep sleep? Experts share why it’s important and how to make sure you’re getting enough of it.

Don’t sleep on this disturbing news. The adverse effects of chronic sleep deprivation are well-documented, but it turns out that a shortage of shut-eye for just a single evening is very bad for you ...

Past studies show the ‘boost’ the brain receives from physical activity normally peaks within the first 10 to 20 minutes. Researchers from University College London have now found that the ...

Struggling to get a good night's sleep? The 10-3-2-1-0 formula might just be the solution you've been looking for. Sleep isn't just about quantity—it's about quality too. Poor sleep can lead to ...

Getting enough sleep is easier said than done — that's where napping comes in handy. Whether you're looking to catch up on rest after a sleepless night or relax in the afternoon, napping is an ...

Sleeping for 7 to 9 hours at night isn't the only way to catch some z's. Here are four alternative sleep cycles -- and they're pretty obscure. Annie Miller Medical Reviewer Annie Miller is a licensed ...

ATLANTA — Need another reason to prioritize your sleep? Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement, or REM, sleep — may hasten the deterioration of ...