REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

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 ... and medical conditions. The best time to nap will vary based ...

Enter the time you’d like to wake up in our tool below and, based on 90-minute sleep cycles, we can tell you the best times to go to bed to wake up feeling fresh. We’re used to hearing that we ...

We can't talk about morning sunlight and improved sleep hygiene without first addressing our circadian rhythm. This is the ...

Aim to get to bed early enough so you wake up feeling refreshed. Stick to your sleep schedule every day, including on your days off. Your body will begin waking up at this time naturally.

Research from the American Academy of Sleep Medicine shows that "compared to those who regularly got 7 to 8 hours of sleep, ...

signaling that it's time to sleep," she said. "If you wake up and can't get back to sleep, get out of bed and do something calming but distracting." "A cooler environment facilitates this ...

I drag myself out of bed in the morning and immediately make a promise that I’m going to go to bed ... and not sleep in for more than an hour past their usual weekday wake-up time.

The environment where you sleep can make all the difference. Keep your bedroom cool, quiet, and dark. Consider using blackout curtains, earplugs, or a white noise machine if light or sound is an ...

Nasha is a Managing Editor for CNET, overseeing our sleep ... time in the sun: Go outside within the first hour of waking up: Since your body is most sensitive to light right around when you wake ...