Purpose: The lower extremities’ biomechanics are crucial to a child’s development mainly because alignment issues might possess a consequential effect on joint mechanics and exacerbate musculoskeletal abnormalities. The purpose of this study is to investigate how children’s foot posture and plantar parameters are modulated by static biomechanical variables such as hip range of motion (ROM) and quadriceps angle (Q-angle). The research also delves into how age and body mass index (BMI) affect these factors, especially in children who are asymptomatic and between the ages of 5 and 15.

Basic Procedures: Quota sampling will be utilized to gather 110 children between the ages of 5 and 15 for this correlational investigation. Anthropometric measures of the participants will be assessed. Biomechanical variables including hip internal and external range of motion, Q-angle measurements with a goniometer, assessment of foot posture using the Foot Posture Index-6 (FPI-6), and determination of the Arch Index based on footprint measurements will be assessed.  The BMI will be computed and how it affects these biomechanical factors will be evaluated.

Main findings: Significant associations between plantar factors (Foot Posture, Arch Index) and static biomechanical variables (Hip ROM, Q-angle) are expected. Furthermore, it is anticipated that age and BMI will have a major impact on these variables.

Principal Conclusions: The research will shed light on the biomechanical interactions between foot posture and lower extremity alignment, highlighting the significance of detecting misalignment problems in children at an early age.

Keywords: Arch Index, Biomechanics, Foot Posture, Lower extremity, Range Of Motion.