Adults spend about one-third of their lives sleeping. But sleep is more complex than many people might realize. Rather than being a single state, sleep occurs in two main forms. Rapid eye movement ...

Struggling with fatigue and a disrupted sleep pattern? Your internal body clock, or circadian rhythm, needs consistent cues ...

Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is crucial for numerous bodily functions. But how to increase deep sleep isn’t ...

A strong relationship exists between sleep and brain health. Long-term sleep disruptions can increase the risk of ...

Deep sleep, like all sleep stages, helps you feel refreshed when you wake up. The proportion of time you need to spend in ...

Some people practically leap out of bed in the morning, while others dread dragging themselves out from under the covers. If you look at morning people with envy, is there anything that science says ...

Most experts recommend getting seven to nine hours of sleep a night — so why do we sometimes get a full night’s rest and still wake up feeling tired? It may have something to do with the point in the ...