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: ...

I'm a contributor specializing in sleep and beauty content. 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 ...

Sleep is kind of a big deal. It’s the best way for our bodies to recover after a hard day, and it also greatly influences our cognitive functions and immune responses. Yet while many of us focus on ...

Your body goes through four stages of sleep — here's how to extend the deep sleep phase for optimal memory processing and ...

This article was reviewed by Felix Gussone, MD. "Stiffness" is often considered a sign of male arousal, but it’s not uncommon to experience it even when you’re not turned on. Nocturnal arousal refers ...