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Biorhythm
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Chart your three biorhythm sine-wave cycles — Physical (23-day), Emotional (28-day), and Intellectual (33-day) — calculated from your date of birth to today. See where each cycle currently sits on its positive, negative, or critical-day crossover point. Identify upcoming peak-performance windows and critical days where caution is advised, helping you plan important activities around your natural energy patterns.
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Biorhythm
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What You Get

Your complete Biorhythm report includes

Physical Cycle
23-day energy & stamina pattern
Emotional Cycle
28-day mood & creativity rhythm
Intellectual Cycle
33-day mental sharpness wave
Critical Days
Zero-crossing caution periods

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Frequently Asked Questions

Everything you need to know about the Biorhythm

What Are Biorhythms?

Biorhythm theory proposes that human performance follows three fixed cycles starting from birth: Physical (23 days), Emotional (28 days), and Intellectual (33 days). Each cycle follows a sine wave pattern oscillating between positive and negative phases. The theory was developed in the late 19th century by Wilhelm Fliess.

Physical Cycle (23 days): Affects strength, endurance, coordination, and overall physical well-being. Emotional Cycle (28 days): Influences mood, creativity, sensitivity, and emotional stability. Intellectual Cycle (33 days): Governs analytical thinking, memory, alertness, and logical reasoning. When a cycle is positive, that area is enhanced.

Critical days occur when a cycle crosses the zero line — transitioning from positive to negative or vice versa. These are considered times of instability and lower performance in that area. When two or three cycles are critical simultaneously, extra caution is advised. Understanding your biorhythm helps plan important activities during peak periods.

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