Biorhythm

Biorhythm is a term that refers to any cycle of changes in the functions of organisms. Examples of biorhythms include the menstrual cycle of women and the annual shedding of leaves and growing of new ones by many kinds of trees.

Some people believe there are three biorhythms that can be used to predict day-to-day variations in a person’s feelings and abilities to perform physical and mental tasks. This article discusses such biorhythms. They are: (1) a 23-day physical cycle, (2) a 28-day emotional cycle, and (3) a 33-day intellectual cycle.

The three cycles are said to begin at birth and continue with absolute regularity until death. The conditions that the cycle controls are favorable during the first half of each cycle and unfavorable during the second half. A person is most likely to experience accidents or other bad luck on critical days. Such days occur on the first day of each new cycle and on days when a rhythm changes from its favorable to its unfavorable phase.

Research has not been able to verify the three cycles and most biologists do not believe that the cycles exist. In addition, biologists know that some human biological rhythms begin before birth, not at birth. Scientists also point out that the characteristics of all known human biological rhythms vary with a person’s age.