Getting enough sleep is important, but understanding what happens while you sleep may be just as valuable. Experts say every ...

Here’s what happens during each cycle—and why uninterrupted sleep matters.

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 ...

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 ...

In my last post, I asked, "Are you getting enough sleep?" Today, in an effort to better understand the role of sleep in our lives, I ask a very basic question: What happens when our heads hit the ...

Add Yahoo as a preferred source to see more of our stories on Google. Michael Gradisar, Sleep Cycle's head of sleep science, evaluated five popular sleep hacks and revealed whether to toss 'em -- or ...

Waking up exhausted but your sleep tracker says you slept great? You aren't imagining it. Here is how your menstrual cycle ...

The Sunrise Group's digital sleep clinic, Dreem Health, is partnering with Sleep Cycle to allow users of the sleep tracking app to access Dreem's network of sleep-focused medical providers. Dreem ...

Scientists tracked more than 35,000 hours of infant sleep and discovered a hidden rhythm that mirrors sleep cycles ...

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 ...