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Because of the joint efforts of Active Healthy Kids Global Alliance, the results from the Global Matrix 2.0, involving 38 countries, provide a timely insight into physical activity (PA) in children and adolescents worldwide.1 All the 38 countries, including China, published a report card on 9 PA indicators.1, 2 Surprisingly, 92% of the countries had average grades of C or D across all indicators, of which the overall PA levels and sedentary behaviors generally had lower grades irrespective of the continent and the country's development.1 It is no surprise that physical inactivity is also quite prevalent in Chinese children and adolescents, which is related to profound social and economic transitions.3 Moreover, it is noteworthy that although the importance of national and regional PA guidelines has been highlighted by World Health Organization (WHO),4 PA guidelines for Chinese children and adolescents have been lacking thus far.
Xu et al. (Tue,) studied this question.