Sleeping for 7 to 9 hours at night isn't the only way to catch some z's. Here are four alternative sleep cycles -- and they're pretty obscure. Annie Miller Medical Reviewer Annie Miller is a licensed ...

Here’s a question from an Oklahoma Medical Research Foundation colleague: My wife and I have recently begun tracking our sleep; I use an Oura Ring and she uses a Garmin watch. The devices not only ...

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 ...

"I have to get my deep REM sleep," expresses a common confusion about two very different types of sleep. Deep sleep and rapid eye movement (REM) sleep are not the same; they do not even overlap. They ...

The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced. By Clarissa Brincat Published Sep 9, 2025 9:00 AM EDT Image: DepositPhotos Get the ...

“Sleep is important to restore the body, but also to clear waste in the brain,” says Brian Koo, MD, a neurologist and assistant professor of neurology at Yale School of Medicine in New Haven, ...

Researchers at the University of Lausanne have identified a novel role for the brain's 'locus coeruleus' in sleep and its disruptions. This brain region facilitates the transition between NREM and REM ...

While we all know the importance of a good night’s sleep, many of us struggle to achieve the recommended eight hours consistently. But what exactly happens inside our bodies during those eight hours ...

The American Medical Association reports that about 30 million people in the US live with sleep apnea, but only one-fifth of these cases are clinically diagnosed. That means that many people are ...