تأثیر کفی کفش با گوه خارجی بر نیروهای عکس العمل زمین و نرخ بارگذاری در گام برداری افراد مبتلا به استئوآرتریت داخلی زانو

 Aims and background: The purpose of this study was to investigate the effect of lateral wedge insole on ground reaction forces and loading rate in patients with knee osteoarthritis. Materials and methods: Ten individuals with medial knee osteoarthritis and 10 healthy subjects with similar age, height and mass were studied. The kinetic variables and walking speed of the subjects were calculated in walking conditions with barefoot, 0, 5 and 11 degrees lateral wedge insole. For inter-group comparison, the repeated measure and for between group comparison the MANOVA test were used, the level of significance was p >0.05. Findings: The results showed that using an insole, significantly increased the speed of walking in the osteoarthritis group )P >0.05(. Also, the GRF was lower in damaged foot than that of normal foot when walking barefoot;besides  the symmetry of foot was improved when osteoarthritis group used an insole. In general, the use of lateral wedge insole increased all components of the ground reaction force in the osteoarthritis group. Conclusion: According to the results of this study, the use of insole improves control in the anterior-posterior direction and symmetry in the foot performance for osteoarthritis patients. However the increase in the Fx component indicated a reduction in lateral control during walking. Therefore, the use of ankle support brace for controlling medial lateral deviations  can make it more stable while walking.