An Overview and History of Biorhythms is read on The Cycles Of Change radio program by host, K. David Katzmire, and he narrates from the KalaRhytms web page at: http://kalarhythms.org/biorhythms/ .
The reading detailes the 23-day Physical Cycles, the 28-day Emotional Cycles and the 33-day Intellectual Cycle . Orinins and early theories are sited from antiquity and the classical Greek. Formative works from the late 19th and early 20th century are described with the works of: Dr. Hermann Swoboda, Dr. Wilhelm Fliess, Alfred Teltscher, Dr. Rexford Hersey & Dr. Michael John Bennett.
More biorhythms are discussed with the theories of a 38-day, 43-day, 48-day and 53 day biorhythms with special mention to author Mort Gale.
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KalaRhythms: Readings from the home page of KalaRhythms.org