Introduction. The article examines the problem of creating healthy learning environments for children and adolescents. The purpose of this research is to identify the characteristics of functional state of schoolchildren’s adaptation system in conditions of limited use of mobile communication devices. Materials and Methods. Data for this study were collected using a hygiene experiment. The sample consisted of 355 schoolchildren. The observation group (n=155) included students separated from their mobile communication devices. The control group consisted of 180 students. The study involved evaluating the functional state of the adaptive capacity of compensatory adaptive mechanisms using generally accepted R. M. Baevsky’s method, modified for the purposes of the research. The identified indicators were subjected to statistical processing. The authors employed the following methods of theoretical research: comparison, formalization, generalization and system analysis. Results. The authors provide an international overview of interventions aimed at reducing mobile phone use in educational settings. The relationship between the state of schoolchildren’s adaptation mechanisms within all age groups and indicators of the cardiovascular system in conditions of separation from mobile communication devices was studied. The authors focus on the values of schoolchildren’s adaptive capacity in conditions of free use of mobile phones during the school day compared to the values obtained in conditions of smartphone separation. The study reveals the correlation between the activity and sensitivity of vegetative regulation of heart rate and gender and age characteristics. Conclusions. The research findings confirm the effectiveness of the restrictions imposed on the use of personal mobile communication devices at comprehensive schools. The authors conclude that limited use of mobile communication devices prevents reducing adaptive capacity of the child's body, therefore it reduces the risk of fatigue and pathological changes.

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Methodological evaluation of the effectiveness of recuperation of children at the present time, according to many authors, requires revision and improvement. One of the traditionally used criteria for assessing the effectiveness of recuperation are somatometric indicators. The aim of the study was to assess the dynamics of the body length of the child during the health-improving shift (21 days) taking into account age and gender differences in order to further substantiate the applied criteria for assessing the effectiveness of health improvement. The object of the study was children of 7–17 years old (n = 18 081) who stayed at 52 stationary recreation and health improvement organizations and who got the high recuperation. effect during the change. Assessment of recuperation efficiency was conducted according to the currently existing methodological recommendations for assessing the effectiveness of recuperation in 2018, data collection and primary analysis were carried out by means of the software tool «Assessment of recuperation efficiency» developed by FBSI «Novosibirsk Research Institute of Hygiene» of Rospotrebnadzor. The database was processed using parametric and nonparametric methods of statistical analysis. It was reliably established that children with underweight and deficit had a smaller mean value of growth gain than children in other physical development groups, also in this physical development group the lowest proportion of children who had growth gain was noted. At the same time, no reliable differences were found between the average values of growth gain in children of different age groups. The above identified patterns can be used in adjusting the integral assessment of the effectiveness of health promotion.

Introduction: Extracurricular activities are an important tool of preparing children for a successful life, setting essential core values, and identifying professional preferences. Student participation in after-school educational programs determines the density of elements contributing to acquiring new skills, knowledge, and physical capabilities in their daily routine. Objective: To assess the coverage of schoolchildren with supplementary education and to give a hygienic assessment of their extracurricular activities. Materials and methods: We analyzed data of the Internet-based survey of over 46,000 schoolchildren from 64 regions of the Russian Federation conducted in January – March 2021 using a standard Excel package and Statistica 10. Results: We estimated a smaller coverage of schoolchildren of all age groups with after-school sports (33.1–43.0 %) than with other types of activities, including circles/sections and studios (39.4–62.6 %). We established that 35 % of the respondents did not participate in extracurricular activities at all, with the largest and smallest proportions of such students in grades 9–11 (45.5–47.3 %) and grades 3–5 (27.7%–28.4 %), respectively. On average, 17.6 % of the respondents reported having regular classes with a tutor; the proportion of children attending tutorials was higher among school graduates and tended to increase with school age from 7.5 to 46.2 %. The proportion of eleventh graders studying with tutors was 35.9 % higher than that attending sports clubs. It should be noted that 20.7 % of the respondents reported having no walk on school days, except walking to school and back home, and the share of such children increased with age. Conclusion: Our study revealed age-specific characteristics of extracurricular activities and leisure of schoolchildren, availability and demand for supplementary educational services, and demonstrated the lack of skills of effective after-school time planning in modern students.

Summer rest in suburban health organisations is a formal form of summer holidays for children and adolescents. The purpose of this work is to assess the impact of a complex of factors of health institutions on the effectiveness of children’s health. The methods. Medical examinations of 14,413 schoolchildren aged 8 to 14 years were collected. All health facilities were divided into three clusters depending on a comprehensive indicator characterising the compliance of the conditions and organisation of rehabilitation with hygiene requirements. The assessment results of external conditions are presented by the specific gravity of the revealed violations for individual elements and, in general, a comprehensive assessment. Comparison of the structure of violations during inspections of organisations’ sanitary and epidemiological conditions was performed according to the χ2 criterion. The risks of a common healing effect were evaluated using the odds ratio (OR) indicator and its 95% confidence interval (CI). The OR calculation was performed compared to the group of the optimal level of the complex indicator of detected violations. Results. Contribution to the comprehensive indicator of non-compliance with requirements in medical work is from 31% to 81%, in catering from 18.3 to 54.1%, accommodation (from 15.3 to 45.5%). In 47.3% of organisations, the effectiveness of recovery was rated as high in 98.2-100% of the examined low in 3.4% of the examined. The dependence of the efficiency indicator of recovery on environmental factors is revealed. Conclusions. There is still a need to develop a health improvement system with improved control of the effectiveness of health improvement and the study of factors contributing to improving the effectiveness of health improvement.