Passive elastic contribution of hip extensors to joint moments during walking in people with low back pain

Hines, Mark, Tillin, Neale, Luo, Jin ORCID: https://orcid.org/0000-0001-5451-9535 and Lee, Raymond (2018) Passive elastic contribution of hip extensors to joint moments during walking in people with low back pain. Clinical Biomechanics, 60. pp. 134-140. ISSN 0268-0033

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Abstract

Background
It has been found that alterations in passive muscle properties may be associated with low back pain, and these may be responsible for the altered gait parameters often observed in subjects with back pain. The purpose of the present study was to assess total hip and passive hip extensor moments in people with or without low back pain during the hip flexion component of walking.
Methods
52 subjects volunteered for this study (low back pain group, n = 25 (male n = 13, female n = 12), control group, n = 27 (male n = 15, female n = 12)). Passive hip moments were calculated using an adapted force transducer during supine testing. A biomechanical model and predictive equation were used to calculate passive hip moments during walking. Total hip moments were calculated with the use of a 9 camera, 3-D motion-capture system.
Findings
Independent samples t-tests demonstrated no significant differences between groups for gait parameters or hip or knee angles. Results of the ANOVAs demonstrated significant differences in passive hip flexor moments during the second half of hip flexion ( P < 0.05).There were also significant differences in hip power and work done during peaks of power absorption and the second peak of power generation ( P < 0.05).
Interpretation
The present data demonstrates that subjects with low back pain have altered passive hip extensor and total power and work done during walking compared with healthy controls. Biomechanical models should include individual measurements of passive joint moments.

Item Type: Article
Uncontrolled Keywords: Passive moments, Hip extensors, Low back pain, Power, Work done
Subjects: Construction and engineering > Biomedical engineering
Medicine and health > Clinical medicine
Medicine and health > Physiology
Depositing User: Jin Luo
Date Deposited: 08 May 2020 12:44
Last Modified: 08 May 2020 15:20
URI: http://repository.uwl.ac.uk/id/eprint/6895

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