Abstract: Since the promulgation of the Outline of the National Fitness Program in 1995, China’s national fitness initiative has undergone vigorous development and yielded significant achievements. As a formalized national policy framework, the implementation of this program carries profound legal implications that warrant systematic analysis. This study begins by examining the legal context of national fitness development in China, focusing on the state’s use of legal mechanisms to design and safeguard the program’s institutional framework. It then details the legal safeguards supporting the program’s implementation, including legislative foundations across multiple governance tiers, explicit recognition in pivotal national policy documents, the establishment of cohesive institutional systems for sustained growth, and diversified measures to ensure practical effectiveness. The study further evaluates the program’s broader legal contributions, such as advancing constitutional implementation through institutional innovation, enhancing governance efficiency via law-based resource sharing, fostering progress in sports-related human rights, and showcasing China’s governance model to the global community. In addition, the discussion was held on the relevant issues concerning the standardized use of "National Fitness", which has become a statutory concept.