
Tune Into Your Body’s 90-Minute Productivity Cycle
Our brains don’t maintain peak focus all day—they operate on “ultradian rhythms,” natural cycles of approximately 90–120 minutes of alertness followed by a 20–30 minute dip. During the high phase, cognitive functions like memory, problem-solving, and creativity are at their best. But once you reach the trough, pushing through leads to diminishing returns: more mistakes,…