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  2. When is the best time to go to sleep? Here’s what experts say

    www.aol.com/article/lifestyle/2019/08/07/when-is...

    Sleep is not like the bank—so you can't accumulate a debt and then try and pay it off at a later point in time,” Walker said. “The brain has no capacity to get back that lost sleep ...

  3. The best temperature for sleep to get a better night's rest - AOL

    www.aol.com/lifestyle/best-temperature-sleep...

    According to the doctors at UT Health San Antonio, the best temperature for sleep is somewhere between 60 and 67 degrees Fahrenheit, although the exact number can vary slightly from person to person.

  4. Sleep efficiency - Wikipedia

    en.wikipedia.org/wiki/Sleep_efficiency

    Sleep efficiency (SE) is the ratio between the time a person spends asleep, and the total time dedicated to sleep (i.e. both sleeping and attempting to fall asleep or fall back asleep). It is given as a percentage. [1] SE of 80% or more is considered normal/healthy with most young healthy adults displaying SE above 90%.

  5. What is ‘Sleep Opportunity’? And How Do I Calculate It? - AOL

    www.aol.com/entertainment/sleep-opportunity...

    It’s a commitment you make every time your alarm goes off: “Don’t worry, body. Tonight, I promise to get eight hours of sleep.” But according to Matthew Walker, director of UC Berkeley’s ...

  6. Pittsburgh Sleep Quality Index - Wikipedia

    en.wikipedia.org/wiki/Pittsburgh_Sleep_Quality_Index

    Consisting of 19 items, the PSQI measures several different aspects of sleep, offering seven component scores and one composite score. The component scores consist of subjective sleep quality, sleep latency (i.e., how long it takes to fall asleep), sleep duration, habitual sleep efficiency (i.e., the percentage of time in bed that one is asleep), sleep disturbances, use of sleeping medication ...

  7. National Sleep Foundation - Wikipedia

    en.wikipedia.org/wiki/National_Sleep_Foundation

    NSF Sleep Duration Recommendations Chart developed based on NSF's research paper [3] In 2015 NSF released the results of a research study on sleep duration recommendations. [4] The paper titled "National Sleep Foundation's sleep time duration recommendations: methodology and results summary" was published in the peer-reviewed Sleep Health ...