This study was successfully completed. We would like to express our sincere gratitude to the schools that participated in the "Online SDT Informed Intervention Motivates Children to Exercise at Home: A RCT Study". Thanks to the support of teachers, students and parents of each school, during the two-year research period, they not only assisted in recruiting families to participate in the collection of empirical data, but also actively cooperated with key processes such as wearing sports monitoring devices and filling out periodic questionnaires, laying a solid foundation for exploring the following issues!