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Pelvic, Hip, and Knee Kinematics of Stair Climbing in People with Genu Varum
J Kor Phys Ther 2018;30(1):14-22
Published online February 28, 2018;
© 2018 The Korea Society of Physical Therapy.

Yun Won Chae1, Seol Park2, Ji Won Park3

1Department of Physical Therapy, Gwangju Health University; 2Division of Biokinesiology and Physical therapy, University of Southern California; 3Department of Physical Therapy, College of Bio and Medical Sciences, Daegu Catholic University of Daegu, Korea
Seol Park
Received January 9, 2018; Revised February 13, 2018; Accepted February 28, 2018.
This is an Open Access article distribute under the terms of the Creative Commons Attribution Non-commercial License ( which permits unrestricted non-commercial use, distribution,and reproduction in any medium, provided the original work is properly cited.
Purpose: This study examined the effects of the lower limb alignment on the pelvis, hip, and knee kinematics in people with genu varum during stair walking.
Methods: Forty subjects were enrolled in this study. People who had intercondylar distance ≥4cm were classified in the genu varum group, and people who had intercondylar distance <4cm and intermalleolar distance <4cm were placed in the control group. 3D motion analysis was used to collect the pelvis, hip, and knee kinematic data while subjects were walking stairs with three steps.
Results: During stair ascent, the genu varum group had decreased pelvic lateral tilt and hip adduction at the early stance phase and decreased pelvic lateral tilt at the swing phase compared to the control group. At the same time, they had decreased minimal hip adduction ROM at the early stance and decreased maximum pelvic lateral tilt ROM and minimum hip rotation ROM at the swing phase. During stair descent, the genu varum group had decreased pelvic lateral tilt at the early stance and decreased pelvic lateral tilt and pelvic rotation at the swing phase. In addition, they had decreased pelvic frontal ROM during single limb support and increased knee sagittal ROM during the whole gait cycle.
Conclusion: This study suggests that a genu varum deformity could affect the pelvis, hip and knee kinematics. In addition, the biomechanical risk factors that could result in the articular impairments by the excessive loads from lower limb malalignment were identified.
Keywords : Genu varum, Stair climbing, Range of motion, Articular, Biomechanical phenomena

February 2018, 30 (1)
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