Daytime “wash cycles” help clear waste from the brain but cause momentary drops in attention after sleepless nights.

Daylight saving time ended Sunday, giving most Americans an extra hour of sleep. Experts say the switch back to standard time ...

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 ...

Before electricity, humans naturally slept in two phases, waking for an hour or two around midnight for quiet activities.

Cortisol, known as the stress hormone, plays a crucial role in waking us up. Its levels are typically highest in the morning, coinciding with our natural waking time. The abrupt change brought on by ...

Disrupted sleep patterns in Alzheimer’s disease may be more than a symptom—they could be a driving force. Researchers at Washington University found that the brain’s circadian rhythms are thrown off ...

Medical experts warn of the health effects tied to the time change, while state and federal lawmakers continue to debate the ...

With daylight saving time fast approaching, our sleep cycles are about to get thrown for a loop. But don’t panic — you don’t have to rely on pharmaceutical sleep aids that leave you groggy or tired.

Researchers at the University of California San Diego have discovered that the gut's rhythmic muscle movements could help ...