the.com/power nap

the twenty-minute cheat code that reboots your brain before sleep can sabotage you.

means A short daytime sleep, usually 10–30 minutes, taken to quickly restore alertness and energy without slipping into the grogginess of deeper sleep.

from A modern American compound, popularized in the late 20th century — the term is often credited to Cornell social psychologist James Maas in the 1990s, who paired the corporate buzzword 'power' (as in power lunch, power suit) with 'nap' to rebrand dozing as a tool of high performers rather than the indulgence of the lazy. 'Nap' itself is far older, from Old English 'hnappian,' to doze or slumber lightly.

sweet spot
Stay under 30 minutes to dodge groggy sleep inertia
caffeine combo
Coffee then nap beats either alone
NASA approved
26-minute naps boosted pilot performance 34 percent
famous fans
Churchill and Einstein swore by daytime dozing
for instance

nasa astronaut sleep protocol — iss crew members take 20-30 minute naps during 16-hour workdays in orbit

emergency room physician naps — cleveland clinic implements scheduled 20-minute naps for 24-hour shift er doctors to reduce errors

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