702 September and October 2023. Volume 12. Num 4 Background and Aims The use of medical insoles is one of the non-surgical treatment methods for im- proving the gait patern of individuals with leg length discrepancy (LLD). However, the long-term efect of insoles on lower limb joint dynamics in these individuals is stll unclear. This study aims to investgate and compare the long-term efect of inner and outer insoles on selected dynamics variables of the lower limb joints in men with LLD during the stance phase of gait. Methods This is a randomized clinical trial with a pre-test/post-test design on 18 men with mild LLD, ran- domly divided into two parallel groups of inner insole and outer insole. Selected dynamics parameters were measured by six cameras and a force plate during the stance phase of gait. Both groups used the insole for 12 weeks for at least four hours per day. Repeated-measures ANCOVA was used to test the hypothesis. P≤0.05 was statstcally signifcant. Results Afer 12 weeks of using insoles, the peak lateral pelvic tlt decreased signifcantly in the inner insole group (P=0.041 for short leg, and P=0.008 for long leg) and outer insole group (P=0.026 for short leg, P=0.007 for long leg). The peak knee abducton moment (P=0.022 for inner insole, P=0.007 for outer insole) and peak hip abducton moment (P=0.006 for inner insole, P=0.005 for outer insole) also de- creased signifcantly. In the outer insole group, the peak anterior pelvic tlt showed a signifcant change in the post-test stage compared to the pre-test stage (P=0.014 for short leg, and P=0.033 for long leg). There was no signifcant diference between the two groups in the selected dynamics variables (P>0.05). Conclusion The long-term use of inner and outer medical insoles, by causing a change in the lower limb joint dynamics, can lead to a positve adaptaton in men with mild LLD. There is no signifcant diference in the long-term efect of inner and outer insoles. Keywords Insole, Leg length discrepancy, Long-term efect, Lower limb dynamics, Walking A B S T R A C T Received: 11 Aug 2021 Accepted: 17 Aug 2021 Available Online: 23 Sep 2023 Citaton Habibi Tirtashi F, Eslami M, Taghipour M. [Long-term Efect of Using Inner And Outer Medical Insoles on Dynamics of Lower Limb Joints in Men With Mild Leg Length Discrepancy During the Stance Phase of Gait: A Randomized Clinical Trial (Persian)]. Scientfc Journal of Rehabilitaton Medicine. 2023; 12(4):702-715. htps://dx.doi.org/10.32598/SJRM.12.4.6 https://dx.doi.org/10.32598/SJRM.12.4.6 Use your device to scan and read the artcle online Research Paper Long-term Efect of Using Inner And Outer Medical Insoles on Dynamics of Lower Limb Joints in Men With Mild Leg Length Discrepancy During the Stance Phase of Gait: A Randomized Clinical Trial 1. Department of Sport Biomechanics, Faculty of Physical Educaton and Sport Sciences, University of Mazandaran, Babolsar, Iran. 2. Department of Physiotherapy, Faculty of Rehabilitaton, Babol University of Medical Sciences, Babol, Iran. Fereshteh Habibi Tirtashi 1 , *Mansour Eslami 1 , Mohammad Taghipour 2 * Corresponding Author: Mansour Eslami, Associate Professor. Address: Department of Sport Biomechanics, Faculty of Physical Educaton and Sport Sciences, University of Mazandaran, Babolsar, Iran. Tel: +98 (11) 25342201 E-Mail: mseslami@gmail.com