Peculiarities of body adaptation to moderate altitude conditions in military personnel

This study aimed to explore the influence of extreme factors on the body's adaptive capabilities and neurodynamic functions in military personnel. The research involved 26 cadets with an average age of 19.7 years; the study was conducted at an altitude of 1100 m above sea level. The cadets engaged in a 5-kilometer forced march at an air temperature of -15°C, with data measured using a Garmin Fenix 6S Pro watch. The adaptive capabilities of the functional state were assessed using the "MPFI rhythmograph-1" system and EasyHRV software, while sensorimotor functions were evaluated using the "DIAGNOST-1" computer system. Statistical analysis, employing non-parametric methods, was applied to the collected data. The results indicate that extreme factors significantly influenced the adaptation capabilities of the cadets. According to the median, the time of passing the distance was 29 min 23 s with an average heart rate of 159.5 bpm and an energy expenditure of 333.5 kcal. Duration of high-intensity activity was 12.28 min in the heart rate zone of 162-181 bpm-1, and zero time was spent in the maximum heart rate zone. The latter may be related to the impact of temperature conditions on the intensity of physical exertion. Indicators of heart rate variability (HRV) showed a statistically significant increase after the 5-kilometer run (p