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 enough of it.

Is deep sleep better than light sleep, even if it's shorter? Experts break it all down. FG Trade via Getty Images We’ve all been there: Maybe you were frantically packing for a trip and only got a few ...

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 ...

A good night’s sleep does more than just help you feel rested—it might literally clear your mind. A new study published January 8 in the Cell Press journal Cell shows how deep sleep may wash away ...

A 2021 phone poll revealed that only 34% of Americans "sometimes" remember their dreams. About 1 in 10 say they "almost always" can, and the same percentage say they "never" do. Explanations for such ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Let's talk about one ...