This study investigates the relationship between gait, posture, and physical activity in school-age children. The research aims to understand how these factors interact and impact each other, providing insights for improving physical development and overall health in this age group. The study employed a mixed-methods approach, collecting data from 100 school-age children using gait analysis, posture assessments, and physical activity monitoring. The results show significant correlations between gait patterns and posture, as well as between posture and physical activity levels. The findings suggest that improving gait and posture can have a positive impact on physical activity levels in school-age children. This study contributes to the existing literature by highlighting the importance of considering the interplay between gait, posture, and physical activity in children's physical development.