GOTHENBURG, Sweden--(BUSINESS WIRE)--Sleep Cycle, the world’s most popular sleep tracking application, today announced the launch of “The Lighthouse”, a soothing sleep aid story narrated by Emmy and ...

As we sleep, our brain moves through four stages and two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). The brain has four stages within the NREM phase. Each stage and phase of ...

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 ...

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 ...

We’ve all been there — dragging ourselves out of bed feeling like we’ve been hit by a truck despite getting a full night’s sleep. The alarm blares, and you wonder how eight hours of rest could ...

GOTHENBURG, Sweden--(BUSINESS WIRE)--Sleep Cycle, the leading sleep technology company, today released its 2024 Presidential Election Sleep Report, revealing surprising metrics on how the U.S.

Time to give these so-called sleep hacks a rest? The team behind the sleep tracker Sleep Cycle crunched data from over 1 million global users to determine the social media slumber shortcuts that have ...

Sleeping and waking up at different times is associated with an increased risk of heart attack and stroke, even for people who get the recommended amount of sleep, according to new research. While ...

Does your teen always seem exhausted, irritable, or struggling to stay awake in class? You're not alone. We're facing what experts have called a sleep deprivation epidemic among American teens. 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, ...