You’ve heard of REM sleep but what about deep sleep? Experts share why it’s important and how to make sure you’re getting ...

Deep sleep, like all sleep stages, helps you feel refreshed when you wake up. The proportion of time you need to spend in ...

It might be worth working a little bit harder to get that much-desired, but often elusive, good night's sleep. Deep sleep clears the mind of waste just as a "dishwasher" cleans dirty plates and ...

Deep sleep is one of the most essential stages of the sleep cycle, playing a vital role in how well you feel both physically and mentally. Often referred to as slow-wave sleep or delta sleep, this ...

Two particular phases in your nightly routine seem to play outsize roles in cognitive health. By Mohana Ravindranath A good night’s sleep isn’t just about the number of hours you log. Getting quality ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Need another reason to prioritize your sleep ...

Unlock peak brain performance with simple sleep adjustments. Dr Vass, a longevity doctor, reveals how optimizing your sleep environment and habits can enhance brain function. Cooling your room, using ...