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

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    "Optimal sleep is important because getting the right number of hours of sleep ensures good sleep architecture and healthy patterns for staying and falling asleep," says Dr. Alex Dimitriu, MD, a ...

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

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    Healthy adults need to sleep at least seven hours a night on a regular basis for optimal health, according to the American Academy of Sleep Medicine. So for most people, eight hours is enough. So ...

  4. Is 7 hours of sleep a night enough? Sleep doctors weigh in - AOL

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    The amount of sleep a person needs is roughly the number of hours they would sleep naturally — without any external disruptions or alarms — to feel fully rested the next day, Dr. Bhanu Kolla ...

  5. Sleep deprivation - Wikipedia

    en.wikipedia.org/wiki/Sleep_deprivation

    Other researchers have questioned these claims. A 2004 editorial in the journal Sleep stated that, according to the available data, the average number of hours of sleep in a 24-hour period has not changed significantly in recent decades among adults. Furthermore, the editorial suggests that there is a range of normal sleep time required by ...

  6. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    The optimal nap duration is around 10–20 minutes, ... Children need many hours of sleep per day in order to develop and function properly: ...

  7. Is 5 hours of sleep at night enough? - AOL

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    Is five hours of sleep enough? Doctors explain how much sleep you need, quality sleep basics, health effects of sleeping 5 hours and tips for better sleep.

  8. 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]

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

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    Is six hours of sleep enough? Doctors explain how much sleep you need, quality sleep basics, health effects of sleeping 6 hours and tips for better sleep. ... which is key for optimal physical and ...

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