| Summary: | 碩士 === 國立陽明大學 === 物理治療暨輔助科技學系 === 101 === Background and purpose: Frontal knee malalignment would alter loading distribution of joints and result in movement compensation or lower extremity pathologies. Usually, normal adult knee angle was about 6 degree into valgus. Excessive genu valgum might be related to low arch, excessive tibial torsion, lateral patella subluxation. It could also affect center of pressure (COP) and further change movement patterns and moments. However, previous studies focused on subjects with specific disease. It was unclear how asymptomaic genu valgum would affect adult lower extremity biomechanics during level walking. Therefore, the purpose of this study was to compare lower extremity kinematics and kinetics during level walking between asymptom genu valgum and normal knee alignment adults. Method: Fifteen asymptomatic adults with genu valgum and eight with normal knee alignment were recruited in this study. Kinematics, kinetics and COP data were collected with a 3D motion analysis and force plate system. Statistical analysis: Independent t tests were used to compare peak kinematics, kinetics data, and maximum displacements between COM and COP during stance phase between the two groups. The significant level was set as 0.05. Results: The genu valgum group showed larger peak knee adduction angle (p=0.042) and peak knee adduction moment (p=0.026) than the normal group. The maximum displacements between COM and COP were similar between two groups. Conclusion: Lower extremity biomechanics did show differences between genu valgum and normal knee alignment, mainly in frontal plane.
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