Sleep Cycles: One rapid eye movement (REM) stage and three non-REM stages that altogether last about 90 to 120 minutes Benefits: Physical and mental recuperation and memory consolidation Disorders: ...

You may remember little to nothing when you wake up, but there’s a lot going on while you sleep. You just spent the previous seven to nine hours moving through a highly structured cycle of sleep ...

Explore the science behind why we sleep and what we can do to sleep better. Sleep impacts all of us. Whether we get a lot of it or not nearly enough, our quality of sleep impacts other facets of our ...

We all know sleep is important, but beyond "get 7-9 hours," how much do we really understand about this mysterious nightly recharge? Prepare to have your mind blown (and hopefully, your energy boosted ...

We all know that getting quality sleep is key to feeling and functioning at our best -- but actually making it happen? That’s a whole different story. Maintaining good sleep habits can feel like a ...

We all need a good night's rest, but how we sleep is highly personal. I tried out a variety of tools to see what works best. Lexy was a producer and on-air presenter who covered consumer tech, ...

Learn facts about sleep, during which the body rests, recuperates and performs essential repairs. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.