Biological Science Backed
Ultradian Rhythm Timer
Stop fighting your biology. Harness your natural 90-minute peak performance cycles and 20-minute healing troughs to achieve effortless deep work.
220:00
Performance90m
Healing20m
Total Cycles2
Peak Perf
Recharge
The Ultradian Performance Rhythm is a natural biological cycle governing our nervous system. Discovered by sleep researcher Nathaniel Kleitman, it reveals that the human brain can only sustain peak focus for approximately 90 minutes before requiring a 20-minute refractory period of healing to prevent stress buildup and burnout.