Actually, it was not "developed" for today's requirements. The Autonomic Nervous System (ANS) was developed many years ago, when the demands on humans were not yet so complex. Somehow we have already prepared ourselves for the new challenges, but adaptation and excessive demands, worries, pressure, fears, hectic but also discontent, emotional exhaustion and of course stress get us emotionally off balance. The autonomic nervous system then quickly loses its balance. Many functions of the body are regulated by the autonomic nervous system, such as sleep. Poor balance is harmful and can also be the cause of other chronic diseases such as diabetes, depression, etc. But first, performance and well- being are severely limited.
The play between Sympatikus and Parasympatikus can be measured by HRV analysis. Heart rate variability (HRV) is the ability of an organism (human, mammal) to change the frequency of the heart rhythm, adapting to the respective situation.
A healthy organism adapts the heart rate to current requirements. Physical as well as psychological stress usually increase the heart rate, which should level off again when relieving and relaxing. Greater variability is an argument in favour of greater adaptability, which is desired. A lack of adaptability can indicate that something is wrong. In the case of chronic stress, it is more often seen that the ability to adapt is limited.
Today, this adaptability can easily be determined with small recorders within the framework of a 24-hour measurement. In addition to HRV, the ECG and the patient's activity are also recorded for medical devices.