Important role in shaping the health of adolescents is played by the environmental factors and lifestyle, the influence of which they are exposed to a greater degree than adults. At the same time, adolescents have not yet formed attitudes to conscious attitude to their health, extremely low medical activity, which exacerbates the impact of risk factors on their health. The aim of the study was to assess the awareness of high school students about the risk factors of lifestyle that adversely affect health, and their prevalence among adolescents. To achieve this goal on a specially designed statistical forms conducted an anonymous survey of 325 boys enrolled in high school four secondary schools in the city of Yakutsk. It was found that high school students are quite well informed about most lifestyle risk factors that have an impact on health. At the same time, in the way of life of many young men (73,9 ± 2,4 of 100) there is at least one risk factor that adversely affects health. Among the risk factors for health in high school students of Yakutsk are more common: prolonged stay at the computer, sleep, excessive consumption of food with high carbohydrate content, small stay in the fresh air, long additional classes, low physical activity. In this regard, it is now a very important task of school, family, health workers is to create in adolescents’ belief in the need to maintain a healthy lifestyle, the formation of a cult of health.