REM sleep goes even deeper into brain recovery, dreaming and processing memories and emotions. This is the sleep stage in which your eyes move rapidly. If you've ever caught your dog or cat in a REM ...

A good night’s sleep isn’t just about the number of hours you log. Getting quality sleep — the kind that leaves you feeling ...

This sleek fitness tracker combines advanced health insights with an even more comfortable fit than its Gen3 predecessor.

Millions worldwide who turn to wearable devices for sleep insights are set to benefit from recommendations on the use of ...

On an Apple Watch, "core sleep" is another name for light sleep, which scientists also call stages N1-N2. It is not a type of deep sleep, and has no relation to REM. But in the sc ...

When in doubt, ask an expert. Dr. Michael Breus, PhD, simplifies and differentiates REM sleep vs. deep sleep for us. REM ...

In the stillness of the night, when the body should lie calm in sleep, something else may be happening beneath the surface.

Even with seven hours of sleep, waking up well-rested is not guaranteed. Sleep trackers and wearables can help determine how you've actually slept throughout the night. Also: I test sleep ...

After tracking my sleep every night for a year ... "While it may help you fall asleep faster, alcohol suppresses REM sleep -- the stage of sleep linked to dreaming, emotional processing, and ...