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10 August 2017 : Clinical Research  

The Effect of Lumbar Disc Herniation on Musculoskeletal Loadings in the Spinal Region During Level Walking and Stair Climbing

Shengzheng Kuai12ABCDEF, Zhenhua Liao2DG, Wenyu Zhou3ADG, Xinyu Guan1CD, Run Ji4CD, Rui Zhang3BC, Daiqi Guo3BG, Weiqiang Liu12G*

DOI: 10.12659/MSM.903349

Med Sci Monit 2017; 23:3869-3877

Abstract

BACKGROUND: People with low back pain (LBP) alter their motion patterns during level walking and stair climbing due to pain or fear. However, the alternations of load sharing during the two activities are largely unknown. The objective of this study was to investigate the effect of LBP caused by lumbar disc herniation (LDH) on the muscle activities of 17 main trunk muscle groups and the intradiscal forces acting on the five lumbar discs.

MATERIAL AND METHODS: Twenty-six healthy adults and seven LDH patients were recruited to perform level walking and stair climbing in the Gait Analysis Laboratory. Eight optical markers were placed on the bony landmarks of the spinous process and pelvis, and the coordinates of these markers were captured during the two activities using motion capture system. The coordinates of the captured markers were applied to developed musculoskeletal model to calculate the kinetic variables.

RESULTS: LDH patients demonstrated higher muscle activities in most trunk muscle groups during both level walking and stair climbing. There were decreases in anteroposterior shear forces on the discs in the pathological region and increases in the compressive forces on all the lumbar discs during level walking. The symmetry of mediolateral shear forces was worse in LDH patients than healthy adults during stair climbing.

CONCLUSIONS: LDH patients exhibited different kinetic alternations during level walking and stair climbing. However, both adaptive strategies added extra burdens to the trunk system and further increased the risk for development of LDH.

Keywords: Activities of Daily Living, intervertebral disc degeneration, Musculoskeletal Abnormalities

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750