ABSTRACT
Abstract@#With the continuous growth in economics and science, physical activity in children and adolescents is gradually decreasing while the sedentary time, such as electronic video screen time, is increasing, which is defined as sedentary lifestyle. Research suggests that sedentary behavior, especially electronic video behavior, is harmful to all dimensions of children and adolescent’ health. Since 2016, the publication of international children’s and adolescents’ physical activity guideline has tended to be a 24-hour movement guideline with more comprehensive dimensions, detailed indicators and operationalities. However, the 24-hour movement guideline for children and adolescents still lacks sufficient evidence, and quite low target achievement rate, which seems to be an ideal goal for the vast majority of children. The purpose of this paper is to explore the current situation of physical activity and sedentary behavior of children and adolescents, as well as the development and evolution of comprehensive guideline. Through literature analysis, it focuses on the independent and combined effects of physical activity and sedentary behavior on children’s health, analyzes and implies the significance of 24-hour movement guideline for children and adolescents’ health, and provides inspiration and reference for future health promotion and behavior intervention among children and adolescents.