Investigation of the Effect of Increased Subtalar Joint Pronation on Static Plantar Pressure Distribution

the foot to adapt to uneven surfaces while also enhancing force transmission. [1]Subtalar joint pronation, which occurs due to its oblique axis, [2] consists of calcaneal eversion, talar adduction, and plantar flexion during weight-bearing. [3]btalar joint pronation is essential for foot adaptation to the ground; [2] however, excessive pronation, or hyperpronation, is a common foot misalignment that can lead to subtalar joint dysfunction. [4]Hyperpronation, an abnormal foot alignment, has traditionally been associated with changes in kinematic variables and force distribution. [5]It is known to contribute to lower extremity overuse injuries, [6][7][8] tibial stress syndrome, [9] Achilles tendinopathy, [10] lumbopelvic dysfunction, [11] and lower extremity alignment issues. [12,13]dditionally, studies have shown that individuals with hyperpronation exhibit increased anterior pelvic tilt in the sagittal plane to maintain postural balance. [14]dividuals with abnormal foot postures may exhibit altered plantar pressure distribution compared to those with normal foot postures. [15]In the assessment of plantar pressure distribution, peak pressure is considered an important indicator of lower extremity function andObjectives: This study aims to identify variations in mean and maximum plantar pressure parameters across different regions of the foot among individuals with neutral, pronated, and hyperpronated foot postures during static standing.Methods: This cross-sectional study included 65 healthy participants categorized into three groups based on their Foot Posture Index: neutral (n=22), pronated (n=22), and hyperpronated (n=21).Navicular mobility and static plantar pressure were assessed using the Navicular Drop Test and the Footwork device, respectively.One-way analysis of variance (ANOVA) with post hoc Bonferroni corrections was used to compare numerical descriptive characteristics between groups. Results:The average age and height of participants were 23.772.77years and 1728.86cm, respectively.Demographic values were similar among groups, except for weight (p=0.020;p<0.05), body mass index (BMI) (p=0.025;p<0.05), and the Navicular Drop Test (p=0.000;p<0.01).No significant differences were found among groups in mean or maximum plantar pressure across different regions of the foot (p>0.05).Conclusion: Plantar pressure distribution did not vary across different plantar regions based on foot posture.Further research is needed to compare plantar loads based on contact areas.