Our sleep and wake patterns
On its own, the circadian rhythm takes almost 24 hours. Our bodies rely on the Sun to reset this cycle and keep it at 24 hours, the length of our days. Light and the dark are important signals for the cycle.
During the night, body temperature drops, metabolism slows, and the hormone melatonin rises dramatically. When the Sun comes up in the morning, melatonin has already started falling, and you wake up.
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The Circadian Rhythm
It is impacted by three main factors:
- Light: probably the most significant pace setter of the circadian rhythm. Staring into a bright light for 30 minutes or so can often reset your circadian rhythm regardless of what time of day it is.
- The time of day
2. Melatonin
- Natural hormone that regulates your body’s circadian rhythm or sleep-wake cycle. Levels of the hormone increase in the evening when it’s dark to promote sleep & decrease in the morning when it’s light to promote wakefulness.
- Getting adequate ...
It matters when you sleep
Our bodies are synchronized with the day-night cycle as our planet rotates. Our circadian rhythms continue even in the absence of any external input. Even plants that are kept in a dark cupboard at a stable temperature open and close their leaves as though they can sense the sun.
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