In the article materials showing the growing influence of both school and extra-school factors on health of children and adolescents are presented. Special attention is given to the main classes of school-related diseases. Aim. To justify reasonability of studying this problem in Astrakhan within the frames of complex approach to application of health-saving technologies. Conclusion. Problems described in the article are characteristic of practically any region of Russia, in this connection a significant number of studies are carried out in Astrakhan region devoted to issues of protection of childrens health and to investigation of exposure of children to environmental factors. With this, absence of works on evaluation of complex use of health-saving technologies in terms of their influence on health of schoolchildren, permits to consider such hygienic studies actual.

Wide use of computers, information and communication technologies and gadgets in industry and society unlocks creativity, refines logic, stimulates analytical and research skills, makes work much easier, and allows many types of activities to be performed remotely. But despite their indisputable advantages, information technologies have a downside. The negative impact of computers and electronic gadgets on the cognitive, emotional and mental states, the gastrointestinal tract, vision and the musculoskeletal system have been proved. Children are particularly sensitive to the negative effects of IT. This study provides concise information on some IT-associated health conditions (IT-associated morbidity) and proposes some measure to minimize the negative effects of IT on children’s health.

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Preservation and strengthening of health in the rising generation is declared as a key direction of the state policy in the Russian Federation. Systematic long-term influence of environmental factors, including mode of living and nutrition, on the processes of formation of health and physical development in children is currently taken as a pressing issue for the entire state, with regional peculiarities, specific to certain regions of Russia. The paper presents an analysis of modern Russian and foreign scientific literature regarding the influence of various environmental factors, conditions of training and education, basic components of the day regime and dietary habits on health of schoolchildren. Literature sources were searched through eLibrary, PubMed, Cyberleninka for the period from 2015 to 2022. In spite of the activities related to health protection of children and adolescents conducted by the state, official statistics and numerous studies display a continuous growth of the socalled school-associated morbidity. Analysis of historical data shows that effect of school and out-of-school factors on health of children and adolescents remains very pressing. Under these conditions, increased literacy of parents, teachers and children regarding hygienic education, formation of a healthy lifestyle and determination of managed sanitary and hygienic factors that can produce a positive influence on health and physical development of schoolchildren is given a great importance.