The Twenty-Minute Nap Rule Actually Works
A short nap can restore focus and mood in the middle of the day — but only if you keep it short. Sleep for more than thirty minutes and you risk entering deep sleep, waking up groggier and slower than before you closed your eyes. Even a short nap can leave you groggy for a few minutes after waking (sleep inertia, NIOSH, US), so give yourself a moment before driving or anything that needs quick reactions.
Set an alarm for twenty minutes and get up the moment it rings. Early afternoon, before three, works best for most people. Treat it as a reset button, not a substitute for the sleep you missed at night.
The point
A short nap restores focus with less grogginess than a long one — just give yourself a few minutes to wake up fully before driving.
Living experience
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