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Article type: Research Article
Authors: Kim, Yongwook
Affiliations: Department of Physical Therapy, Jeonju University, 303 Cheonjam-ro, Wansan-gu, Jeonju, Jeollabuk-do, Korea Tel.: +82 63 220 3261; Fax: +8263 220 2054; E-mail: ptkim@jj.ac.kr.
Abstract: BACKGROUND:Few studies have reported the contribution of correction of leg length discrepancy (LLD) on the kinematic and kinetic characteristics of the pelvis and hip joints among those who must stand while working using shoe insoles and a three-dimensional (3D) motion analysis system. OBJECTIVE:To investigate dynamic pelvic and hip joint angles and hip moments using a 3D motion analysis system with and without insoles in standing workers with LLD. METHODS:Kinematic and kinetic data of 31 participants with LLD were collected using a motion analysis system and force platforms. Participants were asked to walk wearing standard shoes or shoes with LLD-corrected insoles. Repeated-measures analysis of variance (ANOVA) was used to compare the kinematic and kinetic data of the hip joints and pelvic orientation according to leg side and corrective interventions for LLD. RESULTS:There were significant differences in maximal ROM of hip adduction and abduction with vs. without LLD insoles in the longer and shorter legs (p < 0.05). There were significant differences in maximal elevation (p = 0.004) and total coronal motion (p = 0.006) of the pelvic segment with and without insole corrections in the longer leg during gait. CONCLUSIONS:LLD correction using a customized insole is a recommended therapeutic intervention to improve the musculoskeletal imbalances of hip and pelvic segments in workers with LLD.
Keywords: Hip moment, motion analysis, standing work
DOI: 10.3233/WOR-205160
Journal: Work, vol. 71, no. 4, pp. 1129-1136, 2022
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