The article describes the formation of the modern concept of the study of health that arose at the stage of human space exploration. The methodology of heart rate variability, as an indicator of the adaptive reactions of the body, developed in different countries of the world. The study is an important aspect of the research of body reserves in humans, as it allows to obtain information about the tension of the mechanisms of regulation of the body in various conditions of human activity. In connection with the unsatisfactory state of the Russia young population health according to the literature, the work emphasizes the need for practical application of this concept in psychological, pedagogical, psychophysiological prenosological monitoring of the health of not only participants in educational, but also production processes.