Demographic indicators of children's healthand adolescents. In: Health of adolescents and the environment: changes over 20 years: [monograph] ... Demographic indicators of children`s healthand adolescents. In: Health of adolescents and the environment: changes over 20 years: [monograph] / IV Zhuravleva, L. Yu. Ivanova, GA Ivakhnenko [and others]; otv. ed. I. V. Zhuravleva; FNISTS RAS. - Moscow: 2021. P. 23-34. URL: https://www.fnisc.ru/publ.html?id=10033Глава из книги: Здоровье подростков и окружающая среда: изменения за 20 лет: [монография] / И. В. Журавлева, Л. Ю. Иванова, Г. А. Ивахненко [и др.]; отв. ред. И. В. Журавлева; ФНИСЦ РАН. – М.: ФНИСЦ РАН, 2021. 309 с. URL: https://www.fnisc.ru/publ.html?id=9847ISBN 978-5-89697-356-0DOI 10.19181/monogr.978-5-89697-356-0.2021Posted on site: 01.12.21 AbstractThe health status of adolescents is characterized by unfavorable mortality and morbidity trends. The most important are unnatural causes of death, which account for over 70% of deaths. The incidence of adolescents aged 15–17 has increased 1.9 times over 20 years. The physical development of schoolchildren is characterized by an increase in the disharmony of their development, a decrease in physical performance, a significant decrease in the muscle strength of the hands.