Biorhythms

The (most common) theory of biorhythm states, that our daily lives are significantly affected by simple rhythmic cycles.
When we are born, three cycles begin from zero point and then oscillate between -100 and 100 till we die.

- Physical cycles once every 23 days
- Emotional cycles once every 28 days
- Intellectual cycles once every 33 days

Beware of days when any curve crosses zero especially if two or three do this simultaneously.