Your brain cycles through several stages during sleep, and REM sleep might be the most critical. This mysterious phase, where ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

When it comes to sleep, quality is valued over quantity. In other words, you may get a full night’s rest on a regular basis, but if you toss and turn or take frequent bathroom breaks, you may not ...

Your sleep cycle includes light, slow-wave, deep, and REM sleep, which repeat throughout the night. To get restful sleep, you need to spend the right amount of time in each stage of the sleep cycle.

Any sleep tracker will show you that slumber is far from a passive affair. And no stage of sleep demonstrates that better than rapid eye movement, or REM, commonly called dream sleep. “It’s also ...

Neuroscientists studying the shifts between sleep and awareness are finding many liminal states, which could help explain the ...

HOUSTON — A good night’s sleep is important for both the body and brain. It’s essential to understand the four stages of sleep and how to get more restful z’s. Stage 1: Transitional sleep The sleep ...

What Causes Waking Up in the Middle of the Night? Most people wake up once or twice during the night. Reasons this might happen include drinking caffeine or alcohol late in the day, a poor sleep ...

The sleep phase metrics will often suggest how rested you feel even with a full night’s sleep—for example, eight hours of ...