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  2. Biorhythm (pseudoscience) - Wikipedia

    en.wikipedia.org/wiki/Biorhythm_(pseudoscience)

    The biorhythm theory is the pseudoscientific idea that peoples' daily lives are significantly affected by rhythmic cycles with periods of exactly 23, 28 and 33 days, [2] [3] [4] typically a 23-day physical cycle, a 28-day emotional cycle, and a 33-day intellectual cycle.

  3. Circadian clock - Wikipedia

    en.wikipedia.org/wiki/Circadian_clock

    In vertebrates, the master circadian clock is contained within the suprachiasmatic nucleus (SCN), a bilateral nerve cluster of about 20,000 neurons. [10] [11] The SCN itself is located in the hypothalamus, a small region of the brain situated directly above the optic chiasm, where it receives input from specialized photosensitive ganglion cells in the retina via the retinohypothalamic tract.

  4. Biorhythm - Wikipedia

    en.wikipedia.org/wiki/Biorhythm

    Biorhythm may refer to: Biorhythm (pseudoscience), developed by Wilhelm Fliess in the 19th century; Biological rhythm, repetitive cycles that occur in biology ...

  5. Want To Know How Fit You Really Are? Here’s The Stat ... - AOL

    www.aol.com/want-know-fit-really-stat-110000210.html

    Increased energy in daily life: Your cardiovascular system plays a huge role in how energized you feel. A stronger VO2 max means your body delivers oxygen to muscles more effectively, which can ...

  6. What Is Total Daily Energy Expenditure & How Do I Calculate It?

    www.aol.com/lifestyle/total-daily-energy...

    Think of it as your overall metabolism — or how many calories you burn when resting, eating, exercising, and simply existing. TDEE stands for total daily energy expenditure.

  7. How to be fit past 100 without going to the gym, according to ...

    www.aol.com/fit-past-100-without-going-075002846...

    Business Insider has talked to lots of centenarians about what they think has helped them live past 100. Many have kept fit without going to the gym. Building movement into daily life is one of ...

  8. Biological rhythm - Wikipedia

    en.wikipedia.org/wiki/Biological_rhythm

    The best studied rhythm in chronobiology is the circadian rhythm, a roughly 24-hour cycle shown by physiological processes in all these organisms.The term circadian comes from the Latin circa, meaning "around" and dies, "day", meaning "approximately a day."

  9. 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).