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If you work out early in the day, you
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know, before 8 or 9:00 a.m., it's going
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to accelerate that increase in body
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temperature and you'll feel more alert.
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There's also this beautiful phenomenon
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in circadian biology called entrainment
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whereby, let's say you're not a morning
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person. You hate mornings. If you force
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yourself to get up and exercise at say
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6:00 am for three days in a row by the
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fourth day you'll naturally start waking
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up around that time because the
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circadian clock of the brain we call the
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super kaismatic nucleus. The main inputs
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that drive when you're alert and when
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you want to be asleep are sunlight
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exposure to the eyes. This is the whole
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basis for that morning sunlight exposure
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physical activity when you eat and
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social engagement. And there could be a
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whole discussion about this, but suffice
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to say that if you start getting some
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morning light, some exercise, maybe even
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before the sun comes out, some caffeine,
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hydration, and then a meal in the early
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part of the day, your body will start to
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anticipate all of those activities.
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Cities.