A Sloped Seat Wedge Can Change the Kinematics of the Lumbar Spine of Seated
Workers with Limited Hip Flexion |
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| Authors: | Ji-Won Kim Min-Hyeok Kang Kyung-Hee Noh Jun-Seok Kim Jae-Seop Oh |
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| Institution: | 1) Department of Physical Therapy, Nambu University, Republic of Korea;2) Department of Rehabilitation Science, The Graduate School, Inje University, Republic of Korea;3) Department of Physical Therapy, The Graduate School, Inje University, Republic of Korea;4) Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University Ubiquitous-healthcare & Anti-aging Research Center, Inje University, Republic of Korea |
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| Abstract: | Purpose] The purpose of this study was to determine whether a wedge type seat decreases
the lumbar flexion angle of seated workers with limited hip flexion. Subjects] Twelve
sedentary workers with limited hip flexion were recruited. Methods] Three seat surfaces
were used: a level surface, a forward-inclining wedge, and a backward-reclining wedge. The
angles of lumbar flexion and pelvic tilt were measured using a three-dimensional motion
analysis system. Differences in kinematic data of the subjects seated on the three seat
surfaces were analyzed using repeated one-way analysis of variance. Results] The degree
of lumbar flexion decreased significantly when using the forward-inclining wedge compared
with the level surface and backward-reclining wedge. Conclusion] These findings suggest
that sitting on a forward-inclining wedge may be useful for minimizing the compensatory
lumbar flexion of individuals with limited hip flexion who work in a seated position.Key words: Kinematics, Limited hip flexion, Seat wedge |
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