Biorhythms are a theory proposed at the end of the 19th century that dictates that human beings have biological cycles (physical, emotional, intellectual, etc.) based on our date of birth. The cycles can range from 23 to 33 days. There are interesting similarities with the 33 year cycle theory, the cycles of the moon, women's menstruation, etc.
It was a very popular system in the 70's, at the height of the "New Age". Even airlines used it to avoid accidents at work, or in competitive sports.
However, in later years it has been discredited by scientific studies. Thus directly the wikipedia entry specifies "pseudoscience"
More info about on the subject:
https://en.wikipedia.org/wiki/Biorhythm_(pseudoscience)Out of curiosity I asked the yijing.
Is the theory of biorhythms valid?- YongShen: Parent (as theory)
https://www.bright-hall.net/wwg/3/13,1,0,1,1,1,1,6,9,2022-08-09,19:01Complicated hexagram. I think the vital thing here is whether the San He of water is formed (Hai-Mao-Wei). If it is formed it involves the Self line and the Yong shen (Mao parent)
The only way for the San He not to form would be to clash the RL6 You metal. According to Jack Chiu the active line doing the clash must be vitalised by Day to prevent the formation of San He. However You is only vitalised by the month (devitalised by the Wu day) and is far away from the L1 Mao Parent.
What do you think about it? Any comments would be helpful.
