If you’ve ever felt tired after a full night’s sleep, you likely didn’t get enough deep sleep. This stage of sleep is considered to be the most restful, so getting enough of it is key for your overall ...

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 ...

If you use a sleep tracker at night, these are the three metrics you should be paying attention to in the morning.

Few experiences rival the calm satisfaction of falling asleep easily and waking up feeling fully rested. But sleep is more than a luxury or idle downtime, it’s a vital biological process that supports ...

A good night's sleep does more than just help you feel rested--it might literally clear your mind. A new study shows how deep sleep may wash away waste buildup in the brain during waking hours, an ...

Deep sleep is critical to cognitive function. It helps to consolidate memory, focus, and increase problem-solving abilities. When you sleep well, your brain processes information more efficiently, ...

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 ...

Higher nighttime light exposure is associated with increased light sleep duration, with complex effects on deep sleep duration. New research reveals how outdoor nighttime light exposure subtly impacts ...