There could be cognitive benefits to a quick, 15- to 20-minute couch nap when you hit your 3 p.m. slump. There are different ...

Sleep is quite crucial to the overall state of health, but women's sleep cycles differ with age, lifestyle, and hormones.

Sleep also enables the body to repair and replenish cellular material that is damaged or depleted. Important bodily functions such as the production of hormones, tissue growth and muscle repair, for ...

Scientists are exploring a rare genetic trait called Familial Natural Short Sleep (FNSS), where individuals thrive on just 3-5 hours of sleep. Researc ...

You’ll typically complete 4 to 6 cycles per night. The first 3 stages, part of the first phase, are called non-REM sleep (N1 through N3). The final stage and second phase is REM. Stage N1 is the ...

Feeling tired despite enough hours? Learn how understanding your 90-minute sleep cycles & using a sleep calculator can help ...

It makes up less than 3% of your nightly sleep cycles. Stage 2 is where light sleep gets to work. When you are fully asleep, your brain activity slows but has bursts of electrical activity.

spending 25% of it in stage 3 would mean you spend about 2 hours in deep sleep. Each time you go to sleep, you start a new sleep cycle that goes from non-REM stages to a REM stage. The REM stage ...

A new study published shows the discovery of a gene mutation that lets some people get away with only 3-6 hours of sleep. Do ...

Research has linked phone and screen use to disruptions in circadian rhythm, or the natural sleep-wake cycle. A review published in 2018 noted that phone use within one to two hours of going to ...