Everything you need to know about REM sleep, including what it is and how much you need ...

In today’s fast-paced world, sleep is often treated as optional—a luxury we squeeze in between work, social life, and endless scrolling on our phones. Yet, ...

REM stands for rapid eye movement — a stage in the sleep cycle when your brain is almost as active as when you’re awake. Getting enough REM sleep is crucial, as it helps you store information and ...

REM may be the most talked-about part of the sleep cycle, but getting enough of it can still be an elusive quest. You might know by now that it’s important, but maybe you don’t know exactly why or how ...

If you use a sleep tracker at night, these are the three metrics you should be paying attention to in the morning.

Now that we have wearables tracking our every move, a lot of us can look at stats that supposedly tell us how well we’ve slept the night before. But sometimes, it can feel like your sleep tracker is ...

A little-known and poorly understood sleep disorder that occurs during the rapid eye movement, or REM, stage of sleep has been garnering attention for its role in foreshadowing neurodegenerative brain ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Need another reason to prioritize your sleep ...

Obstructive sleep apnea, a condition that causes lower oxygen levels during sleep, is linked to degeneration of brain regions associated with memory through damage to the brain's small blood vessels, ...