Your body goes through four stages of sleep — here's how to extend the deep sleep phase for optimal memory processing and cellular healing.

Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is crucial for numerous bodily functions. But how to increase deep sleep isn’t ...

We spoke to Dr. Zachary Rubin and Dr. Jenna Macciochi to find out more about how sleep affects our immune system and to get ...

Don't let your next vacation or business trip disrupt your sleep quality. Here are seven expert-backed tips on how to get better sleep during travel.

Americans are not getting enough sleep, and it’s starting to take a toll on our health. According to the Centers for Disease Control and Prevention (CDC), adults across the country are sleeping less ...

Technically, we’ll gain an extra hour of sleep when Daylight Saving Time ends on November 2, and clocks “fall back.” But that time change can still throw off your sleep, leaving you feeling groggy and ...

Deep sleep, like all sleep stages, helps you feel refreshed when you wake up. The proportion of time you need to spend in ...

Circadian researchers explain why a single hour can rattle your body, and the simple steps that streamline the switch.

If falling asleep has been harder since the weather got cold, then you might have a case of “winter insomnia.” This is a sleep issue that crops up in the chillier months, and it can make it impossible ...