When you don’t get enough sleep, your whole body can feel off. In college, I tried to fit everything into my schedule, including staying up late to study and waking up early to train for a marathon. I ...

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.

Chances are, if you’re reading this, you got some sleep last night. But are you feeling rested? Experts say it's an important question to consider. Most of us spend a third of our lives sleeping, but ...

Sleep changes with the seasons, especially in winter. Which bedding works best, why a cooler room improves sleep, and how ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. I’m captivated by my new personal health ...

Dr Dean J. Miller is a member of a research group at Central Queensland University that receives support for research (i.e., funding, equipment) from WHOOP Inc, a smart device maker. Many smartwatches ...

Colino is a contributor for TIME. Colino is a contributor for TIME. In a culture that’s highly goal-oriented, yet another form of performance anxiety has emerged: It’s called orthosomnia, and it ...

IT TONIGHT. IT’S HARD ANY NIGHT OF THE YEAR, BUT THE ODDS ARE STACKED AGAINST US WHEN WE SPRING FORWARD. I WOULD SAY ABOUT ONLY 50% GET ABOUT THE RECOMMENDED 7 TO 8 HOURS OF SLEEP. DOCTOR TAREK EID IS ...