How long is Your Circadian Rhythm? - Sleep & Weight Loss

Your circadian rhythm is an inbuild, innate, native clock that drives your sleep and wake cycles as a human being. External factors such as social cues, day and night, light levels, noise, food consumption timing, etc can influence how your body executes the sleep/wake cycle and regulate your body's natural clock. The day is about 24 hours long based on the rotation of the earth, but the circadian rhythm - the "about" a day rhythm - is 24 hours and 15 minutes, so there is definite value in having access to sunlight to keep us on schedule.

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