Ever drive to work and have no idea how you got there? Ever get so little sleep that you started seeing things that weren’t ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

Past age 50, men are much more likely to have REM sleep behavior disorder than women. Jose Luis Pelaez/Stone via Getty Images Every night, you go through four to five sleep cycles. Each cycle, lasting ...

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 ...

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 ...

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 ...

People with sleep disorders share gut microbiome patterns tied to fiber and inflammation, pointing to a possible link between ...

New research shows long-term sleep problems may change gut bacteria, increasing inflammation and health risks beyond the brain.

Waking up at 3 a.m. because one foot slipped out from under the blanket feels oddly dramatic—like your body is sounding an ...

Adequate sleep duration is essential for overall health, but other components of sleep — a consistent bedtime, uninterrupted ...

Frequent nightmares may signal underlying issues. Explore causes, triggers, and strategies to reduce disturbing dreams. The ...

Inside the body, a 24-hour rhythm, known as the circadian rhythm, quietly coordinates when we sleep, wake, eat, and recover.