Biorhythm is based on three rhythms with different period durations. At the end of the period the curves continue as repeating cycles.
Biorhythm is based on three rhythms with different cycle durations:
- physical rhythm (23 days)
- emotional rhythm (28 days)
- intellectual rhythm (33 days)
At birth, these rhythms should start sinusoidally with their first period positive, cross the zero line after half a period length and then go into a negative phase (+/- 100). At the end of the period there is another change to the positive range and so the curves continue as repeating cycles.
Biorhythm at birth
Critical, potentially "bad", days are those transitions where there is a change from positive to negative and vice versa.
If there is a transition of all three phases on the same day, this can have crisis-like consequences according to biorhythm theory, and in contrast to this, the coincidence of positive days can result in particularly good days.
Read more about the persons behind biorhythm theory and history.