At present,China’s economy,culture,education,medical care and other aspects have achieved brilliant achievements.However,national physical health is not optimistic,especially the health problems of young people are worrying,which seriously restricts the pace of China’s construction of sports power.The prerequisite for the continued development and healthy development of youth sports need policy support.In view of the current poor physical health of young people,it is necessary to sort out the policy system of young people’s physical health.This paper introduces the theory of multi-source flow to conduct a theoretical analysis of the changes in Chinese youth’s physical health policies,clarifies the theoretical logic of policy changes,that is,the problem source,policy source and political source of policy changes,and further proposes policy optimization suggestions under the theoretical framework.Therefore,this article first sorts out the policy system,analyzes the historical evolution of adolescent physical health policies through literature data methods,historical research methods,etc.,and believes that there are four major development stages in the development of China’s youth physical health policies The first phase started in 1978 and ended in 1989.This phase was the recovery and adjustment phase.The second phase started in 1990 and ended in 2001.This phase was the legal strengthening phase.The third phase started in 2002 and ended in In 2009,this stage was a stage where the policy entered the norm improvement stage.The fourth stage started from 2010 to the end of 2018.This stage is a stage of rapid policy development.The characteristics of the changes in adolescent physical health policies are: the number of policies is on the rise,the main body of policy is diversified,the policy instruments is constantly enriched and improved,and the policy objectives are constantly adjusted.The results of the analysis of the changes in China ’s adolescents ’physique and health policies using the multi-source flow theory framework show that,from the perspective of the source of the problem,China ’s adolescents’ physiques continue to decline,and focus events such as student sports injury accidents continue to occur.According to scholars ’feedback on the implementation of policies,Some policies are not in place or even canceled.These problems have collectively aroused the concern of policy makers on the health of young people’s physical health,and put the issue of young people’s physical health on the government’s agenda.From the perspective of political origin,since the reform and opening up,the ruling ideas of the party and the government in different periods have attached great importance to the physical health of young people,and national sentiments have unanimously supported the introduction and improvement of the policy of physical health of young people.The policy community within the policy source has put forward practical policy plans and proposals.The party and government attach great importance to the issue of adolescents ’physical health,the masses’ support for the introduction of adolescents ’physical health policies,and the introduction of sound policy plans,and the convergence of the three sources comes into being.Policy entrepreneurs vigorously promoted,and finally opened the window of policy to complete the change of policy.According to the theoretical framework of multi-source flow,suggestions for optimizing the physical health policies of adolescents in China are put forward: first,the source of problems should be targeted and the policy objectives should be clear;second,the source of policy should be enriched and alternatives should be optimized;third,political sources should be used to optimize Problem governance environment;Finally,we should give full play to the role of policy entrepreneurs to promote the introduction of policies. |