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  2. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    Sleeping Girl, Domenico Fetti, c. 1615 . Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. . During sleep, there is a marked decrease in muscle activity and interactions with the surrounding environm

  3. Sleep hygiene: What it is and how to establish a better ... - AOL

    www.aol.com/lifestyle/sleep-hygiene-establish...

    Sleep is commonly referred to as the third pillar of health, yet research repeatedly shows that as many as one-third of Americans aren't getting enough of it. According to the American Academy of ...

  4. 7 Ways to Improve Your Sleep Hygiene & Get a Good Night ... - AOL

    www.aol.com/lifestyle/7-ways-improve-sleep...

    Commit to a regular sleep-wake schedule, prep your space for rest, and create a bedtime routine that triggers your body to prepare for sleep. Implement healthy habits. There are ways to get a good ...

  5. 9 Easy Tips to Increase Deep Sleep - AOL

    www.aol.com/9-easy-tips-increase-deep-125700615.html

    4. Upgrade Your Sleep Environment. Sleep environment can greatly impact sleep quality. For example, studies show that room temperature plays a critical role in circadian rhythm (the body’s ...

  6. Insomnia - Wikipedia

    en.wikipedia.org/wiki/Insomnia

    Medical history and a physical examination can identify other conditions that could be the cause of insomnia. A comprehensive sleep history should include sleep habits and sleep environment, medications (prescription and non-prescription including supplements), alcohol, nicotine, and caffeine intake, co-morbid illnesses. [95]

  7. Sleep cycle - Wikipedia

    en.wikipedia.org/wiki/Sleep_cycle

    It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and wakefulness. In humans, this cycle takes 70 to 110 minutes (90 ± 20 minutes). [1] Within the sleep of adults and infants there are cyclic fluctuations between quiet and active sleep.