ESTIMATION OF LOAD SAMPLES BY INDICATORS OF HEART RATE VARIABILITY FOR MILITARY SERVICES
For professional selection, support of the professional activities of specialists in order to preserve the health and performance of military personnel, especially in extreme working conditions, it is necessary to control the functional state of the body. When conducting mass research, express methods are used to assess the functional state of the body. The set of techniques is recommended by the guidelines of the RF Ministry of Defense. Modern methods for assessing monitoring of heart rate variability with further mathematical analysis allow a deeper assessment of the state of the autonomic nervous system: segmental and suprasegmental. At rest, indicators of heart rate variability depend on the emotional state and are highly variable. The use of stress tests allows you to standardize the survey results. The use of stress tests with monitoring of heart rate variability also allows an in-depth study of both parts of the autonomic nervous system (sympathetic and parasympathetic). As a reference group, 260 men were selected (cadets of the S.M. Kirov Military Medical Academy and conscripts of the Northwestern Military District) aged 18 to 24 years old, practically healthy and not making complaints. The study of the psychological, physical and physiological state of volunteers was carried out using standard methods. HRV studies were carried out with tests performed from 3 pm to 5 pm. In the work, normative corridors for the proposed tests were obtained (multiplication of two-digit numbers in the mind, ortho test, test with deep breathing and with shallow breathing, test with breath holding on expiration and test with physical exertion). The data obtained make it possible to conduct screening examinations with the identification of persons in need of additional medical examination. Also, the data obtained make it possible to assess the tone and strength of the sympathetic and parasympathetic nervous systems, the work of the cardiovascular and central nervous systems, and to standardize the results of the examination of military personnel.