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 ...

All the most commonly prescribed drugs for mental and emotional disorders affect dreams—typically via their effects on REM sleep. Under healthy conditions REM sleep ‘turns on' when activity levels of ...

If you’re looking to get the best night’s sleep in 2026, then you need to be focusing on your REM sleep. I’ve been testing a Luna smart ring for the past few weeks, and its sleep features have been my ...

A nightcap might feel relaxing, but research shows it can fragment your sleep and reduce the quality of your rest.

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 ...

If sleep has gotten harder after 50, you're not imagining it, but there are small, practical changes that can help. By ...

Let's talk about one of the most confusing terms you’ll see on your fitness tracker—specifically your Apple Watch. Next to ...