The “great challenge live and move” (GCLM) is a project implemented since 2013 in order to promote physical activity (PA) in 7-11 years old French school-aged children and their parents. Drawing upon the theory of planned behavior (TPB; Ajzen, 1991), this study aim to test the impact of the GCLM on (1) TPB key constructs (e.g., attitude) and PA practice of children and (2) TPB key constructs of parents as well as their involvement in shared family PA. The primary hypothesis is that the GCLM will increase the proportion of children meeting the current international recommendation of 60 minutes of daily PA. A controlled design is used with 10 schools in the intervention group and 6 schools in the control group. A total of 1120 children (Mean age = 8.94) and 347 parents (Mean age = 40.98) took part in this study. Intervention was one month and a half long and included components targeting both TPB constructs and actual PA practice (e.g., playful PA games). Intervention was implemented by both in-the-field education (e.g., school teachers) and public politics stakeholders (e.g., community of communes). Children answered a questionnaire measuring TPB constructs toward PA and weekly PA practice. Parents also answered a questionnaire measuring TPB constructs toward shared family PA and their involvement in shared family PA. Analyses (e.g., repeated-measures ANOVAs) will be performed to examine potential differences in the evolution of variables between intervention and control group for both children and parents. Results will be available at this time.