Recently, as the phenomenon so-called ＂Running boom＂, the number of people who enjoy running activities has been increasing dramatically. People usually participate in leisure activities such as running, cycling and swimming in their free time. Therefore, it is essential to negotiate several constraints to continue participating in those activities. The purpose of this study was to examine the relationship between continuing leisure activities and constraints in a daily life. In order to accomplish the goal, we examined the constraints that runners face in their daily life to participate in an urban marathon race through the framework of intrapersonal constraints and interpersonal constraints. An internet survey was conducted with participants of an urban marathon race, and a total of 1124 completed responses were collected in this study. As a result of the internet research, it was revealed that running activities become a part of their life for experienced runners, therefore they have sufficiently managed several intrapersonal constraints, especially physical condition, running skill and acquiring a vacation, in their daily life. In addition, it was also revealed that there is little interpersonal constraints for all runners regardless of the duration of running activities because it can be assumed that people who are surrounding them, such as family, have positive attitude for running activities.
