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  2. Exercise and deep sleep give the brain a 24-hour boost - AOL

    www.aol.com/exercise-deep-sleep-brain-24...

    Improvement to cognitive performance caused by exercise could last for 24 hours, a new study shows. Scientists also linked getting 6 or more hours of sleep to better memory test scores the next day.

  3. Is 6 hours of sleep at night enough? - AOL

    www.aol.com/news/6-hours-sleep-night-enough...

    Health impact of only getting 6 hours of sleep Sleeping six hours every night without catching up can lead to chronic sleep deprivation, which increases the risk of a number of health issues, the ...

  4. Which Is More Important: Another Hour Of Sleep Or A ... - AOL

    www.aol.com/lifestyle/more-important-another...

    Despite our best efforts, getting seven to nine hours of sleep and squeezing in a workout a few times per week can be a challenge. It might not always be feasible, but here are some expert tips to ...

  5. Polyphasic sleep - Wikipedia

    en.wikipedia.org/wiki/Polyphasic_sleep

    Polyphasic sleep is the practice of sleeping during multiple periods over the course of 24 hours, in contrast to monophasic sleep, which is one period of sleep within 24 hours. Biphasic (or diphasic , bifurcated , or bimodal ) sleep refers to two periods, while polyphasic usually means more than two. [ 1 ]

  6. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    Sleep is a highly conserved behavior across animal evolution, [6] likely going back hundreds of millions of years, [7] and originating as a means for the brain to cleanse itself of waste products. [8] In a major breakthrough, researchers have found that this cleansing may be a core purpose of sleep. [9]

  7. Sleep deprivation - Wikipedia

    en.wikipedia.org/wiki/Sleep_deprivation

    In the study, 70.6% of students reported obtaining less than 8 hours of sleep, and up to 27% of students may be at risk for at least one sleep disorder. [142] Sleep deprivation is common in first-year college students as they adjust to the stress and social activities of college life.

  8. How to Know If 6 Hours of Sleep Is Enough - AOL

    www.aol.com/know-6-hours-sleep-enough-235900599.html

    Can you really get by with just 6 hours of sleep a night? Here's what to know and how to get more sleep. ... Fitness. Food. Games. Health. Home & Garden. Lighter Side. Medicare. News. Science & Tech.

  9. Slow-wave sleep - Wikipedia

    en.wikipedia.org/wiki/Deep_sleep

    Slow-wave sleep (SWS), often referred to as deep sleep, is the third stage of non-rapid eye movement sleep (NREM), where electroencephalography activity is characterised by slow delta waves. [ 2 ] Slow-wave sleep usually lasts between 70 and 90 minutes, taking place during the first hours of the night. [ 3 ]