Objective: To provide baseline data for the development of physical activity and health promotion strategies and public health policy among Chinese children and adolescents by systematically evaluating accelerometermeasured moderatetovigorous physical activity (MVPA) and sedentary behavior(SB). Methods: The study search was carried out using China National Knowledge Infrastructure, SPORTDiscus with Full Text, and Web of Science, including studies that published from January 1, 2009 to February 28, 2019. The studies were selected by inclusion (based on PICOS principles) and exclusion criteria, and were assessed through quality assessment items based on revised STROBE statement. The information about MVPA and SB were extracted, and Comprehensive Metaanalysis Software (CMA V2) was used to pool the findings from the included studies into a Metaanalysis. Results: Sixteen studies published from 2012 to 2019 were included the Metaanalysis. Sample sizes of eligible studies ranged from 96 to 2 163 participants. Metaanalysis found that Chinese children and adolescents separately spent 37.66 min/day, 539.61 min/d in MVPA and SB. Boys were more likely to have higher level of MVPA in minutes compared to the girls’(P<0.01). Children and adolescents spent more time in MVPA on weekdays than weekends(P<0.05), and also spent more SB on weekdays than weekends(P<0.05). Conclusion Chinese children and adolescents are physically inactive and live a sedentary lifestyle in general, especially among girls. MVPA and SB time among children and adolescents spent on weekdays are higher than weekends.

Objective: Physical literacy is the breakthrough point and fundamental goal to achieve the integration of sports and education, sports and public health and expand the function of physical education. Studying the children and adolescents physical literacy is a common responsibility for children and adolescents health, sports and health education workers. This article was based on the latest research evidence and expert opinions in China, aiming to develop the core items of physical literacy guidelines for Chinese children and adolescents. Methods: This article systematically combed the dimensions and index system of children and adolescents physical literacy through systematic literature review. After five rounds of Delphi methods, the core items were extracted. Results: The core items included four interrelated dimensions of body, emotion, behavior, and cognition, which were specifically composed of four components: physical ability, emotional experience, physical activity related behaviors, and knowledge understanding and application ability. Conclusion Children and adolescents are the key periods, sensitive periods, and window periods to cultivate physical literacy. The core items can provide framework recommendations for further refining guidelines. More empirical studies should be carried out in the future, in order to accumulate enough evidences and further to improve Physical Literacy guidelines, better to guide physical literacy promotion.