Body Mass Index and Lumbar Lordosis in Children: A Cross-Sectional Study

Introduction: Childhood, particularly between the ages of 10 and 12, is a critical growth phase marked by significant physical changes. Body Mass Index (BMI) is a key factor in assessing nutritional status and can influence postural development. An abnormal BMI may contribute to postural disorders, including lumbar hyperlordosis, characterized by excessive curvature of the lumbar spine. This study examines the relationship between BMI and lumbar lordotic curvature in children aged 10–12 years at SD Negeri Kelurahan Panjer to aid in the early prevention of musculoskeletal disorders. Methods: This cross-sectional study employed an observational analytic approach with purposive sampling, involving 139 children. BMI was measured using weight and height calculations, while lumbar lordotic curvature was assessed using a flexible ruler. Data were analyzed using Spearman’s rho correlation test. Results: The analysis revealed a significant association between BMI and lumbar lordotic curvature (p = 0.002, p < 0.005) with a weak correlation coefficient (r = 0.26). Conclusion: Higher BMI is associated with increased lumbar lordotic curvature in children aged 10–12. However, this study has limitations, including an uneven BMI distribution among subjects and a lack of control over physical activity, sitting habits, and genetic influences. Future research should consider these factors and include a more diverse sample to obtain more comprehensive findings.