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There was revealed the structure of deteriorations in the nutritional status of schoolchildren in the city: the most of students has normal nutritional status, but there was noted the high prevalence of excessive body weight and obesity among children and teenagers. Risk factors for development of deteriorations of the nutrition state were detected as follows: irrational food regimen, qualitative compartment offood, factors of educational environment, lifestyle. The main role in system of control of the nutritional status in children is referred to the correction of socio-hygienic factors which prove to be the priority ones in the shaping of the nutritional status in students. As the main condition determining the nutrition state of the up-to-date schoolchildren and the quality of their life in the whole the social cultural level of children and adolescents must be regarded as a result of the hygienic education and training in fundamentals of healthy lifestyle. Priority protective factors of the gain in the part of schoolchildren with normal nutritional status (optimalfood regimen, optimal dietary habits, sufficient level of physical activity) laidfrom the child age in conditions of the family, sufficient level of the physical activity and the implementation of the other element of hygienically expedient day regimen served as the base for the elaboration of the system of the control of nutritional status. Algorithm of the control of the nutritional status in the students of educational institutions includes the creation of healthcare educational environment, optimization of nutrition and physical activity, the shaping of the culture of healthy lifestyle, health-improving measures for children with disorders of nutritional status and their psychological pedagogical supports at the stage of the correction of the nutritional status, improvement of the medical service for the early detection of deviations of nutritional status with the estimation of the efficiency of the system ofpreventive and health-improving measures.

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The article presents the physiological and hygienic justification for the rating scale for biological age “Bio-age”, developed during preventive medical examinations in the Health Center of 602 students (253 boys and 349 girls) aged 18-22 years in 2014/17. To develop the biological age assessment scale “Bio-age”, the following indices were used: the level of total cholesterol and blood glucose, blood pressure, the percentage of the fat, active cell mass and total water in the body, basic metabolism, vital, power and ankle-brachial index, activity index of regulatory systems. The assessing the biological age on the scale “Bio-age” revealed half of the students (57.1% of the boys and 52.0% of the girls) to have a biological age corresponding to the passport age. There were revealed 5.6% accelerated young men and 9.5% retarded girls. Comparison of the results obtained according to the scale “Bio-age” with the data of the evaluation by the method of V.P.Voitenko, as the most widespread in our country, did not reveal significant differences between the two methods and confirmed their informationally equal importance. The biological age rating scale “Bio-age” is used in the course of preventive examinations of students at the Health Center. The expediency of determining the biological age of students contributes to their conscious reorientation to a healthy lifestyle, which is the key to their more successful training in professional skills.