Biorhythm may refer to:
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Biorhythm (pseudoscience)
The biorhythm theory is the pseudoscientific idea that our daily lives are significantly affected by rhythmic cycles with periods of exactly 23, 28 and 33 days,. typically a 23-day physical cycle, a 28-day emotional cycle, and a 33-day intellec ...
, developed by Wilhelm Fliess in the 19th Century
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Biological rhythm, repetitive cycles that occur in biology, studied in the science of chronobiology
See also
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Chronobiology
Chronobiology is a field of biology that examines timing processes, including periodic (cyclic) phenomena in living organisms, such as their adaptation to solar- and lunar-related rhythms. These cycles are known as biological rhythms. Chronobi ...
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