Science:
Your brain has a built-in afternoon dip. Cognitive performance drops ~7-8 hours after waking due to circadian biology.
Action:
Do your most important cognitive task between 2-4 hours after waking.
From the Neurologist:
The prefrontal cortex loses efficiency as adenosine builds. Sleep enertia can keep you groggy for about 2 hours after waking. And your circadian rhythm brings on the “post-lunch” afternoon dip in performance, not the meals you eat. Early day work aligns with peak metabolic function.
References:
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