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

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

    During the recommended seven to nine hours of sleep, we typically go through three to five sleep cycles per night, with the duration of REM sleep getting longer each subsequent time, Varga explains.

  3. Sleep deprivation - Wikipedia

    en.wikipedia.org/wiki/Sleep_deprivation

    The National Sleep Foundation recommends that adults aim for 7–9 hours of sleep per night, while children and teenagers require even more. For healthy individuals with normal sleep, the appropriate sleep duration for school-aged children is between 9 and 11 hours.

  4. Not Everyone Needs the Same Amount of Sleep. Here's Why - AOL

    www.aol.com/not-everyone-needs-same-amount...

    “There are many people who think everyone needs eight to eight and a half hours of sleep per night and there will be health consequences if they don’t get it,” Dr. Louis Ptacek, a neurology ...

  5. The Truth About Whether 7 Hours of Sleep Is Enough ... - AOL

    www.aol.com/truth-whether-7-hours-sleep...

    Newborn. 0-3 months. 14-17 hours (including naps_ Infant. 4-12 months. 12-16 hours (including naps) Toddler. 1-2 years. 11-14 hours (including naps) Preschool

  6. Hypnogram - Wikipedia

    en.wikipedia.org/wiki/Hypnogram

    Cycles of REM and non-REM stages make up sleep. A normal healthy adult requires 7–9 hours of sleep per night. The number of hours of sleep is variable, however the proportion of sleep spent in a particular stage remains mostly consistent; healthy adults normally spend 20–25% of their sleep in REM sleep. [5]

  7. Do you really need 8 hours of sleep every night? Sleep ... - AOL

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    If you're getting the recommended seven to nine hours of sleep a night and still feeling sleepy or tired, this could be a sign of poor sleep quality, according to the U.S. Centers for Disease ...

  8. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    Children need many hours of sleep per day in order to develop and function properly: up to 18 hours for newborn babies, with a declining rate as a child ages. [65] Early in 2015, after a two-year study, [ 91 ] the National Sleep Foundation in the US announced newly revised recommendations as shown in the table below.

  9. How much sleep do you need? - AOL

    www.aol.com/lifestyle/much-sleep-201727378.html

    Sleep requirements vary by age and personal factors, but most adults need 7-9 hours of sleep per night to function at their best. You may need more or less depending on your lifestyle and age.

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