In order to provide the basis for the formulation of the coordinated development strategy of social sports in Beijing,Tianjin and Hebei,literature review,questionnaire,mathematical statistics and logical analysis are used to investigate the status of physical exercise participation of the aged residents in the Beijing,Tianjin and Hebei,so as to analyze the problems of physical exercise participation of the elderly residents in Beijing,Tianjin and Hebei,which include: 1) How to scientifically exercise is a m...