A sleep expert details why you wake up groggy from a nap and how to make the most of your snack-sized slumber.

You need about 1.5 to 2 hours of deep sleep each night. This is also the stage of sleep when it's most difficult to wake up. Deep sleep is as important as REM when it comes to physical rest ...

We ask an expert why REM sleep is so important, what happens if we don't get enough of it and how to get more REM sleep.

New research on ‘slow-wave sleep’ may have implications for others battling insomnia, including people with anxiety and ...

Researchers at the RIKEN Center for Brain Science (CBS) in Japan have uncovered how perceptual memories linked to positive ...

Some mornings, waking up might feel like interrupting a vivid alternate universe. You open your eyes to reality, but the ...

A delay in getting to the rapid eye movement (REM) stage of sleep may be linked to Alzheimer's disease and related dementias, ...

If you wake up during deep sleep, you’re more likely to experience grogginess – “sleep inertia”. Hitting the snooze button ...

Shorter naps only include stage-two sleep, which is particularly helpful for alertness and memory, said Sara Mednick, a sleep ...

A board-certified sleep medicine specialist reviews the history of wearable sleep trackers and explains how clinicians ...

OxStu's breakdown on the science behind sleep, providing practical advice on how to establish a good sleep routine.