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A biorhythm (from Greek βίος - ''bios'', "life"〔(βίος ), Henry George Liddell, Robert Scott, ''A Greek-English Lexicon'', on Perseus〕 and ῥυθμός - ''rhuthmos'', "any regular recurring motion, rhythm"〔(ῥυθμός ), Henry George Liddell, Robert Scott, ''A Greek-English Lexicon'', on Perseus〕) is an attempt to predict various aspects of a person's life through simple mathematical cycles. Most scientists believe that the idea has no more predictive power than chance〔 "No evidence exists to support the concept of biorhythms; in fact, scientific data refute their existence."〕 and consider the concept an example of pseudoscience.〔 "The theory of biorhythms is a pseudoscientific theory that claims our daily lives are significantly affected by rhythmic cycles overlooked by scientists who study biological rhythms."〕〔.〕〔.〕 ==Theory== Basic rhythm details * Physical cycle * * 23 days; Circavigintan * * coordination * * strength * * well-being * Emotional cycle * * 28 days; Circatrigintan * * creativity * * sensitivity * * mood * * perception * * awareness * Intellectual cycle * * 33 days; Circatrigintan * * alertness * * analytical functioning * * logical analysis * * memory or recall * * communication According to the theory of biorhythms, a person's life is influenced by rhythmic biological cycles that affect his or her ability in various domains, such as mental, physical and emotional activity. These cycles begin at birth and oscillate in a steady (sine wave) fashion throughout life, and by modeling them mathematically, it is suggested that a person's level of ability in each of these domains can be predicted from day to day. The theory is built on the idea that the biofeedback chemical and hormonal secretion functions within the body could show a sinusoidal behavior over time. Most biorhythm models use three cycles: a 23-day physical cycle, a 28-day emotional cycle, and a 33-day intellectual cycle.〔These cycles are to be adjusted based on the person's personal day clock which may run from 22 hours to 27 hours although 23-25 is the norm. Two ways you can find your personal day clock is grip test and body temperature every 15 minutes for a few days or easier same time each day for a few months.〕 Although the 28-day cycle is the same length as the average woman's menstrual cycle and was originally described as a "female" cycle (see below), the two are not necessarily in any particular synchronization. Each of these cycles varies between high and low extremes sinusoidally, with days where the cycle crosses the zero line described as "critical days" of greater risk or uncertainty. In addition to the three popular cycles, various other cycles have been proposed, based on linear combination of the three, or on longer or shorter rhythms.〔http://www.skepdic.com/biorhyth.html〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「biorhythm」の詳細全文を読む スポンサード リンク
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