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 ... best time to nap will vary based on your work schedule, sleep-wake ...

These differences aren’t just habits—they’re part of someone’s biology, and these differences can be grouped into a variety ...

We can't talk about morning sunlight and improved sleep hygiene without first addressing our circadian rhythm. This is the body's 24-hour sleep-wake cycle. It naturally responds to light and darkness, ...

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 ...

Research has found that bad sleep could lead to numerous health problems, including heart disease. Here are recommendations ...

If you're tired of running to the restroom at night, it's time to save your sleep with these five ... prompting you to go pee when you wake up. As a result, you may need fewer nighttime trips ...

If you need help getting comfortable at night, our guide to the best mattresses we’ve tested this year is the place to go. But ... personalize your sleep and wake-up routines, and you can ...