Spiritual · Cycles
Biorhythm Tracker
Enter your date of birth to chart your physical, emotional, and intellectual cycles, today and for the next two weeks.
The Three Cycles
Each biorhythm cycle is modeled as a perfect sine wave beginning at zero on the day of birth. The Physical cycle (23 days) governs energy, strength, and coordination. The Emotional cycle (28 days) governs mood, creativity, and sensitivity. The Intellectual cycle (33 days) governs analytical thinking, memory, and decision-making.
Values above zero represent the positive, high-performance phase of each cycle. Values below zero represent the recovery or recharging phase. Days when a cycle crosses zero (called critical days) are traditionally considered the most unstable in that domain.