Circadian rhythms are natural, 24-hour patterns that play a vital role in the sleep-wake cycle. Learn more about how they work and how to keep them aligned.
in the morning and darkness in the evening helps synchronize your sleep-wake schedule. Natural light, a regular sleep schedule, and exercise are key to maintaining a healthy circadian rhythm.
A circadian rhythm ( ), 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). Circadian rhythms a...
Learn how to reset your circadian rhythms, including your sleep-wake schedule, through light exposure, exercise, strategic meal times, and more.
Circadian rhythm sleep disorders occur when a person's internal schedule mismatches with the schedule of their environment. Learn about symptoms and treatments.
Learn how to understand circadian rhythm, the body's 24-hour clock that regulates its sleep/wake cycle, with articles and resources from Sleep Cycle.
Circadian rhythm sleep disorders ( CRSD ), also known as circadian rhythm sleep-wake disorders ( CRSWD ), are a family of sleep disorders which affect the timing of sleep. CRSDs cause a persistent pattern of sleep/wake disturbances that arise either by dysfunction in one's biological clock...
Circadian rhythm disorders, or sleep-wake cycle disorders, are due to a disruption to the body’s internal clock and subsequently one’s sleep-wake timing.
How does your body clock affect your sleep drive? Learn how your circadian rhythm and sleep schedule are related, and how they can change throughout your life.
How does your body know it's time to sleep? Learn about the science of sleep, including the stages of sleep, circadian rhythm, and sleep-wake cycle.