Introduction and aim: Physical activity and especially the motor proficiency of children have been studied from different aspects. The purpose of the present study was to determine the correlation among Functional Movement Screening scores with motor proficiency and physical activity levels of children aged 10 to 13 (Mean=11.72, SD=0.932) in Tehran province. Methods: In this descriptive study of correlation, all the children of primary schools in Tehran province were considered as the study population, from which 94 girls were selected by cluster random method. Their motor proficiency, physical activity levels, and functional movement were evaluated with Bruininks Oseretsky test-Short Form (BOT-2), International Physical Activity Questionnaire- Short Form (IPAQ-SF), and Functional Movement Screening test (FMS) respectively. Findings: The results of the Pearson correlation coefficient test showed that there is a significant relationship between the scores of the children's functional movement screening test and their BOT-2 total score (P=0.000), but the correlation between the total score of the functional movement screening test and the total score of the physical activity levels was not significant (P=0.267). Conclusion: In general, due to the existence of a significant relationship between functional movement and motor proficiency, the next step is to use early interventions and study their effect on improving children's performance and motor proficiency.
