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: ...

Sleep quality has long dominated health discussions, but emerging research suggests timing might be equally crucial for overall wellbeing and longevity. The hour at which we surrender to slumber ...

A new study finds that sleep timing is linked to dementia risk, as people with weak circadian rhythms face a 2.5 times higher ...

Delayed sleep phase syndrome (DSPS) is a most prevalent circadian rhythm sleep disorder and is marked by a delay in the timing of sleep episode compared to desired or necessary sleeping and wakeup ...