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Leg Length Discrepancy to Influence on Kinematic Changes of the Pelvis and the Hip during Gait
J Kor Phys Ther 2019;31(6):368-371
Published online December 30, 2019;
© 2019 The Korea Society of Physical Therapy.

MinSik Yong, SoHyun Park

Department of Physical Therapy, College of Health Sciences, Youngsan University, Yangsan, Korea
SoHyun Park E-mail
Received December 9, 2019; Revised December 24, 2019; Accepted December 26, 2019.
This is an Open Access article distribute under the terms of the Creative Commons Attribution Non-commercial License (Http:// which permits unrestricted non-commercial use, distribution,and reproduction in any medium, provided the original work is properly cited.
Purpose: The purpose of this study was to investigate the effects of leg length discrepancy on kinematic changes of the pelvis and hip during gait.
Methods: A total of ten healthy women with no history of neurological, musculoskeletal surgery or injuries, or pain in the lower limbs were recruited. They were assigned to two groups; the experimental group (LLD) consisting of five subjects leg length discrepancy of 10mm to 18mm and the control group (CON) consisting of five subjects leg length discrepancy of<10 mm. All participants were instructed to perform three walking trials for further analysis by using the Cortex 3.0 software program. Independent T-test and Mann-Whitney test were used to examine the effects of mild LLD on kinematic changes of the pelvis and hip during gait.
Results: Angles of hip flexion, hip abduction, pelvic obliquity, and pelvic tilt in the experimental group were not significantly different compared to those of the control group.
Conclusion: Mild leg length discrepancy induces kinematic changes in the lower limbs, including decreased hip flexion, increased hip abduction, and increased pelvic obliquity in the shorter limb, and increased hip adduction and increased pelvic obliquity in the longer limb. However, those changes were not significant.
Keywords : Leg length discrepancy, Motion analysis, Gait

December 2019, 31 (6)
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