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  2. Circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Circadian_rhythm

    A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous ) and responds to the environment (is entrained by the environment).

  3. The best sunrise alarm clocks of 2025 - AOL

    www.aol.com/lifestyle/best-sunrise-alarm-clocks...

    Light exposure in the morning can regulate circadian rhythms, according to Dr. Raj Dasgupta, an ABIM-quadruple board-certified physician specializing in internal medicine, pulmonology, critical ...

  4. 7 Ways to Improve Your "Sleep Hygiene" & Get a Good Night's Rest

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

    Physical activity (even just walking) supports your circadian rhythm, which, in turn, promotes better sleep. Regular exercise also triggers the release of endorphins (“happy hormones”), which ...

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

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

    Our internal clock or circadian rhythm is driven by the rising and setting of the sun. Martin says spending time outdoors every day has a myriad of health benefits, including supporting quality sleep.

  6. Circadian clock - Wikipedia

    en.wikipedia.org/wiki/Circadian_clock

    A circadian clock, or circadian oscillator, also known as one’s internal alarm clock is a biochemical oscillator that cycles with a stable phase and is synchronized with solar time. Such a clock's in vivo period is necessarily almost exactly 24 hours (the earth's current solar day). In most living organisms, internally synchronized circadian ...

  7. Light effects on circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Light_effects_on_circadian...

    The physiological changes that follow these clocks are known as circadian rhythms. Because the endogenous period of these rhythms are approximately but not exactly 24 hours, these rhythms must be reset by external cues to synchronize with the daily cycles in the environment. [1] This process is called entrainment. One of the most important cues ...

  8. Jet lag - Wikipedia

    en.wikipedia.org/wiki/Jet_lag

    Jet lag was previously classified as a circadian rhythm sleep disorder. [2] The condition may last several days before a traveller becomes fully adjusted to a new time zone; it takes on average one day per time zone crossed to reach circadian reentrainment. [3] Jet lag is especially an issue for airline pilots, aircraft crew, and frequent ...

  9. Sleep and emotions - Wikipedia

    en.wikipedia.org/wiki/Sleep_and_emotions

    The circadian rhythm provides a person with a signal for when to sleep and when to wake up. [43] If circadian rhythm and sleep-wake cycle are misaligned, this might lead to negative affect and emotional instability. [44] It has been found that emotions vary depending on the circadian rhythm and the duration of how long one was awake. [45]