Comprehensive anthropometrical examination of 225 schoolchildren of municipal educational institutions of the Surgut district was conducted. The aim of the work was assessment of physical development of high school students constantly living on the territory of Khanty-Mansi autonomous Okrug (KhMAO) - Ugra. Methods. The key anthropometrical indicators: body length and weight, chest circumference were registered according to standard research techniques. Body mass indices, proportionality index and somatotype were calculated to assess children's physical development. Results were analyzed by means of the standard methods of mathematical statistics. All the surveyed were divided into following groups: representatives of indigenous ethnic groups of the North (Khanty) who came for the educational period to boarding schools; metises of the first generation who had one of parents the Khanty's representative; descendants of the alien population. Each group was additionally divided by gender. Results. It was stated that the key anthropometrical indicators in metises had in-between position among experimental groups. Values of body length in metises were closer to those in descendants of the alien population, and body weight and chest circumference - to the indicators of representatives of indigenous ethnic groups of the North. According to body density indices, proportionality of body development and orientation of growth processes metises were more similar to the Khanty's school children. Conclusions. Possibly, adaptation of the alien population of KhMAO - Yugra to climatic factors happened through miscegenation with predominant inheritance of anthropometrical signs of indigenous ethnic groups of the North.

The research involved 479 schoolchildren living on the territory of the Khanty-Mansi Autonomous Okrug – Yugra (KMAO – Yugra). Two groups were singled out: the Khanty and 1st and 2nd generation descendants of newcomers. The following parameters were studied: blood pressure, heart rate, double product, and index of functional changes; the frequency of deviations from standard values was identified. In addition, the dominant type of circulation was determined. The analysis of the children’s circulatory system parameters revealed some ethnicity-related features. It was established that Khanty children have higher aerobic capacity of the cardiovascular system and lower blood pressure than newcomers’ descendants. Blood pressure deviations from the norm (high blood pressure in girls and arterial hypertension in boys) were statistically more common in newcomers’ descendants. Virtually one in two children had heart rate exceeding the normal values. Moreover, we observed increased stress of the cardiovascular system in the group of newcomers’ descendants (in girls aged 12–15 and boys aged 14–17 years) which was indicated by higher values of double product and index of functional changes. Hyperkinetic type of circulation was predominant in both groups, being, however, more frequent in Khanty children. The revealed features of the cardiovascular system in children of different ethnic groups living in KMAO – Yugra highlight the importance of developing regional and ethnic standards for an objective evaluation of children’s health. For citation: Govorukhina A.A., Kon’kova K.S. Features of the Circulatory System in 8–17-Year-Old Children of Different Ethnic Groups Living in the Khanty-Mansi Autonomous Okrug – Yugra. Journal of Medical and Biological Research, 2021, vol. 9, no. 2, pp. 126–137. DOI: 10.37482/2687-1491-Z050

A spirographic study of 80 students from 1-3 courses of Surgut State Pedagogical University at the age of 18-20 years old, born and residing in the North has been carried out. The aim of the work was to study the peculiarities of the respiratory system of the university students. Measurement of respiratory function was carried out by means of Program Apparatus Complex "Spiro-Spectrum". Results were analyzed by standard methods of mathematical statistics. All surveyed belonged to 1 and 2 health groups. Students with chronic and acute diseases of the respiratory system were excluded from surveyed group. It was found out that needed respiratory minute volume at rest in students-smokers was achieved by increase in respiratory rate and not by respiratory volume which was more energy-consuming. Reduce of maximum expiratory flow from 50 % and 75 % of forced vital capacity (FVC) and forced expiratory flow rate from 25-75 % FVC in students-smokers were reflection of respiratory failure and a high risk of obstructive disorders development. Lower rates of maximum breathing capacity in smokers compared to proper values show decrease in the frontier of external breathing.