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 ...

No doubt you've heard about the importance of proper sleep to the point of redundancy. Weight gain, performance loss and irritability are among the many effects we worry about when we don't get enough ...

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 ...

When a person is asleep, their core body temperature drops. Heart rate and breathing also slow down and overall metabolic activity decreases by about 10%. A sleeping body may seem inactive at first ...

When you picture the ideal night of sleep, what comes to mind? For many people, it’s (at least) eight blissful hours of uninterrupted snoozing. There’s no sound of snoring in your ear. No ...

Sleep comprises one third of our adult life. It is essential for normal functioning; without it, we experience memory lapses, have difficulty with concentration, experience mood alterations, become ...

“Sorrow can be alleviated by good sleep, a bath, and a glass of wine.” —Thomas Aquinas Getting enough restful sleep is not a basic luxury, it is a biologic necessity. Sleep is far more than about ...

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 ...