مجلة المنظومة الرياضية
Volume 13, Numéro 1, Pages 540-561
2026-03-01

The Impact Of Physical Activity Level On Bmi And Motor Performance In Children Aged 9–11: A Comparative Field Study



Authors : Mihoubi Mourad .

Abstract

This study examines the influence of physical activity levels on Body Mass Index (BMI) and motor performance in children aged 9–11 years, with the aim of identifying differences linked to varying activity intensities and their implications for physical health during late childhood. A comparative descriptive design was employed, using a multi-stage cluster random sample of 142 students drawn from elementary schools in Biskra Province during the 2024–2025 academic year. Participants were categorized into three groups based on their weekly physical activity (high, moderate, low). Motor performance was assessed through standardized tests: the one-leg stance (balance), the 30-meter sprint (speed), and the vertical jump (muscular strength), while BMI was calculated using height and weight measurements. Data were analyzed via one-way ANOVA. Findings revealed significant differences across activity levels. Children with higher physical activity reported lower BMI values and superior motor performance compared to moderately active and inactive peers. These results confirm the protective role of regular physical activity in maintaining healthy body composition and enhancing balance, speed, and muscular strength during a critical developmental stage. The study underscores the importance of integrating structured physical activity programs into schools and community settings as a preventive and developmental strategy for children’s physical health.

Keywords

Physical Activity Level ; Body Mass Index ; Motor Performance ; Late Childhood

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