The theory of biochemistry phasing which claims that human beings experience three biological cycles that are able to be charted as: (1) a twenty-three day cycle of physical strength, energy, endurance, (2) a twenty-eight day cycle of emotional sensitivity, intuition, creative ability, (3) a thirty-three day cycle of mental activity, reasoning, ambition.
Charting these cycles serves the purpose of indicating the individual's maximum and minimum potential in any of the three cycles as well as the greatest days of stress when there is an intersection of two or three cycles. It is thought an individual can be aware of his best and worst days in order to achieve maximum success and confidence on his best days and to avoid becoming over stressed on his worst. The theory is an attractive one since it relates well with the biochemical cycles of the human body, especially the menstrual cycle in women. There is considerable empirical validation for claims made for biorhythm. The theory was discovered by Dr. William Fleiss of Germany.
Since body cycles relate to birth dates, the system of biorhythm is analogous to medical astrology. Many doctors use it in diagnostic work. Businesses use it in predicting future productivity and earnings. Even football games have been predicted by the use of biorhythm. Billie Jean King won her greatest tennis match against Bobby Riggs on a "high" day. It is said that both Judy Garland and Marilyn Monroe committed suicide on critical days.
The Omi Railway in Japan achieved an accident-free safety record with the use of biorhythm. Some 5000 other Japanese companies also employ biorhythm as well as European airlines and transportation systems in other companies.