NIZHNEVARTOVSK FEMALE STUDENTS’ CARDIAC ACTIVITY INDICATORS DEPENDING ON PHYSICAL ACTIVITY LEVEL

Physical inactivity as a serious health threat to students is exacerbated in the North by extreme environmental and climatic conditions. The aim of the study was to assess the state of the circulatory system at rest and during graded physical exercise in female students of a northern university, depending on the volume of their organized physical activity. The study involved female students from the Faculty of Physical Culture and Sports (PCS) (n=37) and the Faculty of Ecology and Engineering (EE) (n=51) of Nizhnevartovsk State University (NVSU). The parameters were obtained using volume-compression oscillometry with the APKO-8-RITs-M device at rest and during a test with graded muscle exercise (20 squats in 30 seconds). Results and Discussion. In female students with higher volumes of organized physical activity (OPA) (Faculty of Physical Culture and Sports), significantly lower values were observed at rest for: systolic blood pressure (SBP, mm Hg); cardiac output (CO, L/min); cardiac index (CI, L/(min. m²)); stroke volume (SV, mL); stroke index (SI, mL/m²). Following the exercise test, female students from the Faculty of Ecology and Engineering demonstrated higher values for SBP, diastolic blood pressure (DBP), CO, CI, SV, and SI. Conclusion. The study results indicate a pronounced economization of hemodynamic function in females with a higher volume of habitual motor activity, both under resting conditions and during a physical load test with limited duration and muscle group involvement. This economization may be attributed to a partial redistribution of the load from the cardiac muscle to the skeletal musculature, which maintains good functional status due to adequate OPA volume.