Monitoring the health of astronauts based on the assessment of the functional state of the body within the realms of norm and pathology. The area of functional states qualifies as the yellow score of health on a notional scale "traffic light of health": Modern medicine is particularly interested in studying the health of the yellow score, because of the preventative measures that could still be taken before making contact with the healthcare system.
The article presents the main provisions of the methodology for the analysis of heart rate variability (HRV), which is now actively and widely implemented in many fields of medicine and applied physiology.
The present paper deals with prenosological diagnostics as methodology of an estimation of functional states of an organism. Highlighted is its first practical application in space medicine, at long influence of stressful factors, including such factor unusual to terrestrial organisms as weightlessness.