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http://dx.doi.org/10.18857/jkpt.2019.31.1.13

Comparisons of Accuracy of Knee Joint Motion During Closed verse Open Kinetic Chain Tasks in Subjects with Flexible Flatfeet  

Kim, Ju Sang (Department of Biomedical Science, Graduate School, Daegu Haany University)
Kwon, Younghyun (Department of Physical Therapy, Yeungnam University College)
Lee, Mi Young (Department of Physical Therapy, College of biomedical Science, Daegu Haany University)
Publication Information
The Journal of Korean Physical Therapy / v.31, no.1, 2019 , pp. 13-17 More about this Journal
Abstract
Purpose: This study examined the effects of flexible flatfeet on the accuracy of knee joint motions in closed and open kinetic chain tasks. Methods: Twenty-four healthy participants were recruited for this study. The subjects were divided into two groups using a navicular drop (ND) test: flexible flatfoot group (n=12, male: 6, aged $22.00{\pm}2.22years$) and age-matched control group (n=12, males: 6, aged $22.17{\pm}1.53years$). The accuracy of knee motion was measured quantitatively by tracing through the flexion and extension motion of the knee joints in the closed kinetic chain and the open kinetic chain. Results: There was a significant difference in the accuracy index between the groups in closed kinetic chain task, but there was no significant difference in the open kinetic chain task. In addition, there was a significant difference in the accuracy index between the closed kinetic chain and the open kinetic chain task in the flexible flatfoot group. In addition, a significant negative correlation was observed between the ND and accuracy index in the closed kinematic chain task, but there was no significant relationship between the ND and accuracy index in the open kinematic chain task. Conclusion: Flexible flatfeet can affect the accuracy of the adjacent joints, such as the knee joint in the closed kinematic chain.
Keywords
Flexible flatfeet; Closed kinetic chain; Open kinetic chain;
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