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  1. Circadian Rhythm: What It Is, How It Works & What Affects It

    Mar 15, 2024 · Your circadian rhythm is the pattern your body follows based on a 24-hour day — it’s the name given to your body’s internal clock. This rhythm tells your body when to sleep and …

  2. Circadian rhythm - Wikipedia

    A circadian rhythm (/ sərˈkeɪdiən /), 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 …

  3. Circadian rhythms: How it works, what affects it, and more

    Jan 11, 2021 · Circadian rhythms are cycles in the body that occur roughly across 24 hours. In humans, circadian rhythms cause physical and mental changes in the body, including feelings …

  4. Understanding Circadian Rhythms - National Sleep Foundation

    Dec 3, 2020 · What is a Circadian Rhythm? How do circadian rhythms work, and how do they affect sleep? Circadian rhythms are driven by your body’s internal master clock—it controls …

  5. What Is Circadian Rhythm? - Sleep Foundation

    Jun 26, 2025 · Your circadian rhythm is your body’s internal clock, helping regulate sleep, wakefulness, hormone release, and other biological processes over a 24-hour cycle.

  6. Sleep & Circadian Basics - Sleephealth.org

    Learn sleep and circadian basics and get familiar with the master clock that controls sleep and circadian rhythms throughout the day.

  7. Circadian Rhythm: What It Is, How it Works, and More - Healthline

    Jan 22, 2025 · Your circadian rhythm is your body’s internal clock. Light, sleep patterns, hormones, meals, and temperature can all influence your circadian rhythm, which in turn can …

  8. Circadian Rhythm: What It Is and How It Works - Health

    May 26, 2023 · A circadian rhythm is a natural process that regulates your body's sleep and wake patterns, among other key functions. It's often described as an internal clock that operates on …

  9. Circadian Rhythms: A Straightforward Guide

    6 days ago · ‘Circadian’ is a portmanteau of ‘circa’ and ‘diem’, meaning ‘around a day’ in Latin. Circadian rhythms are complemented by ultradian rhythms (shorter rhythms that occur multiple …

  10. Circadian Rhythm: What Is It, How It Works, Why It’s Important

    Mar 4, 2025 · What is a circadian rhythm? A circadian rhythm is a natural process that regulates physiological and behavioral changes. The term circadian comes from the Latin phrase “circa …