Focus
Ultradian Rhythm
Ultradian rhythm is the shorter alertness cycle inside your day—often ninety to one hundred twenty minutes—where planned breaks sustain focus better than nonstop grinding.
Ultradian rhythm is the body's recurring cycles within a day—often ninety to one hundred twenty minute peaks and dips of alertness and fatigue—not just the twenty-four-hour circadian clock. Honoring ultradian dips with short breaks can sustain deep work and reduce afternoon crashes better than grinding four hours straight.
Stack demanding cognitive work on upswings and admin on dips.
Common questions
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How is ultradian rhythm different from circadian rhythm?
Circadian rhythm is the roughly twenty-four-hour sleep-wake cycle; ultradian rhythms are shorter waves of alertness and fatigue within the day. Both inform when to work and when to rest.
Related terms
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