Abstract: The background of this article comes from the marathon craze in China. The main purpose of this paper is to analyze the common people's morning exercise behavior, reveal the motivation and social background behind people's running phenomenon, and provide reasonable suggestions for national fitness. This paper makes a long-term follow-up observation on the morning exercise activities and competition behaviors of a group of runners, by using sociological and anthropological research methods such as field investigation and deep description. This paper deeply depicts the group image of mass runners, describes the different mentality of different runners when they run and participate in competitions, reveals the social background and deep-seated motivation of mass fitness in the new era, so as to improve public fitness behavior and cultivate public fitness, to provide reference and suggestions for further promoting the construction of healthy China. The conclusion of this paper shows that stable material living conditions are the main cause of the upsurge of running and the paired running behavior reflects the fact that people's purpose of running is not only to keep fit or exercise, but also to meet the needs of people's social interaction.Abstract: The background of this article comes from the marathon craze in China. The main purpose of this paper is to analyze the common people's morning exercise behavior, reveal the motivation and social background behind people's running phenomenon, and provide reasonable suggestions for national fitness. This paper makes a long-term follow-up observation...Show More