Wiki Biorhythm

What there is to know about the biorhythm.


Ancient origins

Biorhythmics is a fascinating field that studies the natural, periodic cycles that affect an individual's physical, emotional, and intellectual well-being. Its history is long and complex, with origins that date back to ancient times and have seen steady development and refinement over the centuries.

The notion of biorhythms has profound roots in ancient medicine and philosophy. The idea that the human body and mind are subject to natural cycles that affect well-being was known to the ancient Egyptians. They developed sophisticated calendars and timing systems to track the periodic floods of the Nile River, which they saw as analogous to cyclical patterns in the human body and in nature in general.

The Egyptians were not the only ancient cultures to study cyclic patterns and rhythms. Ancient China also developed the idea of life energy or "qi" circulating through the body and being influenced by cyclical patterns. Traditional Chinese medicine, which evolved from these beliefs, still places great emphasis on understanding and balancing these energy flows.

The ancient Greeks also contributed to the development of the concept of biorhythms. Physicians such as Hippocrates and Galen often spoke about the importance of rhythms and cycles in the human body. They viewed disease as an imbalance in these natural rhythms and considered restoring balance as a central aspect of healing. The philosophy of the Greeks, especially the teachings of Plato and Aristotle, also emphasized the importance of harmony and balance, including the rhythms and cycles of life.

Medieval and Renaissance

During the Middle Ages and the Renaissance, the concepts of biorhythmics continued to be explored, although they were often mixed with mystical and astrological ideas. Medieval physicians, influenced by the teachings of Galen, held to the humoral theory that linked health and temperament to the balance of four "humors": blood, phlegm, black bile, and yellow bile. These humors were thought to fluctuate in cyclical patterns, influencing health and illness, mood and behavior.

Astrology also played an important role in the medicine of this time. The movements of celestial bodies were seen as signs that could help understand and predict cyclical patterns in the human body. Although these approaches are now considered pseudoscientific, they were an important part of the development of the concept of biorhythms and helped raise awareness of the importance of cycles and rhythms in the human body.

Age of Enlightenment and Industrial Revolution

With the Age of Enlightenment and the Industrial Revolution, scientists began to critically examine and revise the old theories of biorhythms. This period saw significant advances in biology and medicine, and many of the old ideas about rhythms and cycles in the body were replaced by newer, scientifically based concepts. A major breakthrough came in the 19th century with the work of the German physician Wilhelm Fliess.

Card image cap

Fließ(right) with Freud (left)

The Berlin physician Dr. Wilhelm Fliess (1858-1928) developed at the beginning of the 20th century the period theory named after him. Based on extensive observations and statistical evaluations of healthy and sick people, he was able to determine what he called "two periodic processes with constant intervals of 28 and 23 whole days, respectively".

Today we know these biorhythms as physical or bodily rhythm and emotional or mental rhythm and thus as the two most central biorhythms of the entire doctrine.

Fliess' theories were far ahead of his time, and they generated a mixture of admiration and criticism. Nevertheless, they influenced many other scientists and thinkers, including the famous psychoanalyst Sigmund Freud, who worked closely with Fliess and was influenced by his ideas.

Card image cap

Herrmann Swoboda

At the same time as Dr. Fliess, Herrmann Swoboda (1973-1963) also discovered, according to his own statements without knowing about him, both the physical and the mental biorhythms, but published his findings in 1904 only after Fliess. Swoboda is considered the founder of the "period theory" of biorhythms.

In "The Periods" he describes the spontaneous periodic return of thoughts after 18 hours, 23 hours and after 23 days. He devotes an extensive chapter to the work of Fliess, but does not mention the underlying findings from Freud's The Interpretation of Dreams of 1900. He is therefore accused of plagiarism, and of having appropriated Fliess' theory.

In1917 he added the septennial recurrence to his periodic thesis. In the course of the time the course of the periods was developed to a wave curve (sine). Thereby the curve begins with the birth.

The 20th century and modern biorhythmics.

In the 20th century the concept of biorhythms was further elaborated and expanded. The theories of Fliess and Swoboda led to intense discussions and research in the first half of the 20th century. Some researchers, such as the American psychologist Rexford B. Hersey, attempted to measure the effects of biorhythms on work performance and workplace safety. Others, such as the German physician Alfred Teltscher, studied the effects of biorhythms on learning and academic performance.

Card image cap

Hermann Teltscher

In the 30s of the 20th century Prof. Dr. Hermann Teltscher extended the Fließsche period theory by two further rhythms. A 33-day, so-called intelligence rhythm and a 38-day intuitive rhythm.

In the 1950s Hans Genuit developed the mathematical connection of the different basic rhythms for the first time. The success curve can be traced back to him.

Today we know a total of 7 different biorhythms with periods between 23 to 53 days and 6 linked biorhythms derived from them.views.explanation.phasemodel.title=Phasemodel

During this time, chronobiology, an interdisciplinary field of science that studies biological rhythms and cycles, also developed. Researchers in this field studied a variety of biological rhythms, from daily sleep-wake cycles (circadian rhythms) to monthly menstrual cycles and the seasonal rhythms of animals and plants. This research helped develop a deeper and more comprehensive understanding of biorhythms and their effects on human well-being.

Biorhythmics became popular in the 1970s and 1980s through the work of Bernard Gittelson, who introduced the concept of biorhythms to a wider audience. Gittelson developed simple methods and tools to calculate and interpret a person's biorhythms, claiming that they could be used to predict and improve performance in sports, business, and other fields.

Today, biorhythmics is a dynamic and diverse field that has a multitude of applications. While some scientists question the accuracy and usefulness of biorhythmics, there are also many who recognize its potential benefits and continue to explore new ways to use and improve it.

With advances in technology and the growing availability of data, biorhythmics has opened up new possibilities for improving health and well-being. Biorhythmics apps and tools such as allow people to track and interpret their own biorhythms, providing valuable insights into their health and well-being.

The history of biorhythms teaches us that our well-being and performance are intimately connected to the natural rhythms and cycles that permeate our bodies and minds. By understanding and respecting these rhythms, we can live healthier, more balanced and fulfilling lives.

In this sense, biorhythmics is not only a science, but also a philosophy - a philosophy that sees life as a complex interplay of rhythms and cycles that vibrate in harmony with each other and with the world around us. It is a philosophy that encourages us to listen to our body's signals, to track our energy and moods, and to make our activities and choices in harmony with our natural biorhythms.


The biorhythm follows the course of a sine curve. The beginning is at the zero point (birthday). After that, the curve starts to rise to the maximum and then falls again to the zero point. This phase covers half the period and is also called the active phase. The regeneration phase begins, which falls from the zero point to the minimum and then rises again from the minimum to the zero point. The zero points have a special meaning (critical days).

Image Description
positive area of a biorhythm
If the value is in the positive range (from 1 to +100), their respective abilities are strengthened. Activities now lead more easily to the goal.
negative range of a biorhythm
If the value is in the negative range (from -1 to -100), their respective abilities are weakened. The abilities should be regenerated.
critical days of a biorhythm
Days when the biorhythm changes from positive to negative or vice versa are the days that tend to be "worse". The value of the biorhythm is then zero. On these days, performance and attention can be significantly lower and peak performance cannot be expected. In times of great mental tension, illness or high physical or mental stress, you should be careful on these days.
critical days of several biorhythms
The days when 2 or 3 biorhythms change the range at the same time are especially critical. 2 biorhythms are in the critical range at the same time about every 1.75 to 2.5 years, all three biorhythms only about every 58 years.
The maximum is reached at a value of +100. Here all things that are affected by the respective biorythm are at their most powerful value.
A value of -100 is the minimum. All affected functions are at their lowest level.

Known Biorhythms

Primary Period duration: Influence of:
Physical 23 days Physical strength and endurance, health status, drive and decisiveness, vitality, coordination, and general body functions.
Emotional 28 days Feelings, Mood Swings, Empathy, Conflict resolution, Imagination, Temperament, Sensitivity, and Creativity.
Intellectual 33 days Intelligence, Logic and Analytical thinking, Decision-making and Learning ability, Mental reaction, Attention, Ambition, and Mental state.
Supplemental Period duration: Influence of:
Intuitive 38 days Intuitive perception, Sensitivity
Spiritual 53 days Spirituality, Perception and Personal relationship with that which transcends our existence.
Consciousness 48 days Self-awareness, Self-confidence
Aesthetics 43 days Aesthetics, Creativity and creative abilities
The combined primary biorhythms are derivatives of the primary biorhythm cycles. Combining each of two primary biorhythms results in three rhythms, each with its own meanings.
Combined primary Period duration: Influence of:
Mastery No regularity The rhythm of mastery is a combination of physical and intellectual biorhythms. The rhythm of mastery measures the ability to apply logic and intelligence to physical activity. While the primary physical biorhythm determines physical strength, the mastery rhythm determines a more refined and primarily controlled ability to apply physicality. It maps the ability to use intelligence to implement actions, to apply knowledge and experience more efficiently, and to complete tasks quickly and with a better or more positive outcome.
Passion (Passion) No regularity The passion cycle is a combination of the physical and emotional biorhythms. Passion refers not only to your sexual energy, but especially to projects that are close to your heart. The rhythm determines the enthusiasm and passion you bring to your tasks.
Wisdom No regularity The wisdom cycle is a combination of intellectual and emotional biorhythms. This cycle shows the interaction of mind and heart. Wisdom encompasses your understanding of the world, your role in it, and the things that really matter to your life. Your personal insight is affected, as is your recognition of inner qualities and relationships. Your judgment, use of knowledge and experience, and common sense will also be affected. Understanding what is right helps you to make important decisions.
By combining the intuitive biorhythms with the three primary biorhythms, the following 3 intuitive biorhythms are derived.
Combined intuitive Period duration: Influence of:
Perception (Perception) No regularity This rhythm is a combination of physical and intuitive biorhythms. This allows us to see things more clearly, to act intuitively and quickly, and to make decisions based on both conscious and unconscious factors. One is better able to perceive finer details of the environment, recognize subtle signals, and use this information more effectively to take action.views.explanation.biow.short=Perception,perception
Mentality (psychic) No regularity This rhythm is a combination of emotional and intuitive biorhythms. This allows for improved emotional intelligence, where emotions and intuition can be used effectively for decision making and problem solving. Additionally, it allows us to be more empathic and attentive in social interactions. We can also understand and manage our own emotional states more effectively, which can lead to improved overall well-being.
Success No regularity This rhythm is a combination of intellectual and intuitive biorhythms. It allows us to process and effectively merge conscious and unconscious information, resulting in improved decision making. This ability can be particularly useful when faced with complex problems and uncertainties, where both logical thinking and intuitive insight are needed to find an optimal solution.
Other Rhythms Period duration: Description
Average No regularity General status (mean value of all biorhythms)
Moonphase 29.530588861 Days The moon goes around the earth once during this time. The moon phase changes from full moon to waning to new moon and then increases again to full moon.

The Biorhythm Pyramid

To better illustrate the relationships between the various biorhythms, we can make use of mathematics and the Platonic solids already known to the Greeks. Platonic solids are mathematically expressed, polyhedra with the greatest possible symmetry. The tetrahedron is the simplest of the five Platonic solids. It consists of an equilateral triangle as a base and equilateral triangles standing on it. A tetrahedron is just like a regular pyramid, like the known buildings of the Egyptians. However, its base is square.

If you assign the 4 primary biorhythms to the 4 corners of a tetrahedron, then the connecting lines of the 4 corners and thus the edges of the tetrahedron can be assigned to the secondary biorhythms as we know them. This results in the following picture of the biorhythm tetrahedron:

Image Description

It is always difficult to show a spatial representation on a sheet of paper. Therefore we can use a trick. If we cut open the biorhythm tetrahedron at the upper point and simply fold down the 3 side faces, we get a so-called body mesh of the tetrahedron. This body net is very easy to grasp and with regard to the biorhythm it shows very well the interrelationships of all biorhythms.

Image Description

It is immediately noticeable that the previous upper point of the tetrahedron (intuitively) is now present 3 times, which was created by unfolding the biorhythm tetrahedron. The central triangle corresponds to the base of the biorhythm tetrahedron and shows us the basis starting from the primary biorhythms physically, emotionally and intellectually. The mathematical connection of 2 of these biorhythms corresponds to the connecting lines (sides of the triangle) and represents the respective secondary biorhythms. The same consideration is now applied to the mathematical connection of the 3 primary biorhythms with the 4th, the intuitive biorhythm. This results in the depicted outer triangle with its associated secondary biorhythms success, perception and mentality.

There are 3 more additional biorhythms that have been added in the course of development. These are the spiritual rhythm with a period of 53 days, the biorhythm self-consciousness (48 days) and the biorhythm aesthetics (43 days). The assignment of these biorhythms to the primary and secondary biorhythms was not possible until now.

However, the observation via the tetrahedron shows a possible connection. If we look at the periods of the 4 primary biorhythms in the tetrahedron, we can construct a connection in each outer triangle. In the triangle emotional (28), intellectual (33), and intuitive (38), the mathematical result is the arithmetic series 28-33-38. Continuing this series 28-33-38 automatically brings us to period 43, which corresponds to the aesthetic biorhythm. In the triangle physical (23), intellectual (33) and intuitive (38), one can continue the series 23-33-38 with 48, which brings us to the biorhythm self-consciousness with a period of 48 days. In the triangle physical (23), emotional (28) and intuitive (38), we can continue the series 23-28-38 with 53 (geometric series 23+5=28 + 10=38 +15=53) , which amazingly leads us directly to the spiritual biorhythm.

Summarizing a closed picture of the dependencies of all biorhythms and shows that the tetrahedron and the triad present in it can reflect our state of mind very well.

Cycle comparison

This is the conventional comparison in biorhythmics. The offset between the periods (cycle) of a biorhythm line is determined once and weighted. This correspondence is independent of time, so it is always constant. If the correspondence is low for the respective biorhythms, the individuals can support and complement each other, while if the correspondence is high, the effects can reinforce each other.

Image Description

Day comparison

From the daily biorhythm values of two profiles, the agreement of the individual values can be determined by setting the distance between the two values in relation to the possible maximum deviation (from -100 to +100 = 200). In this way, it is easy to see whether the two people are in harmony in their daily values. Here, 100% indicates perfect agreement, while 0% indicates no agreement at all. If the agreement is low, the persons can support and complement each other, while if the agreement is high, the effects can reinforce each other.

Harmony Factor

The harmony factor is a key figure for simple evaluation of harmony or congruence between two profiles. The primary and secondary biorhythms are taken into account and from this the degree of congruence is determined on a scale from 1 to 10. A harmony factor of 8-10 indicates a very high degree of congruence. If the harmony factor is between 4-7, a very good agreement with emphasis in certain areas is reached. It is especially important to note that even low concordance is quite positive, as the complementary factor can be very helpful.

Matching factor

The agreement factor is a key figure, in order to summarize the individual values determined during the daily comparison and to represent an overall value for the evaluation of the daily condition. Thereby a high agreement does not automatically mean that both persons agree very well in the good. It can also be that all biorhythms are negative and here the agreement is also very high. Therefore, to evaluate this ratio, the individual biorhythms from the analysis should always be checked as well.