Back muscle strength and fatigue in healthy and chronic low back pain subjects: A comparative study of 3 assessment protocols

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Abstract

Objective: To compare the sensitivity of 3 different back test protocols in measuring differences in strength and fatigue between subjects with and without chronic low back pain (CLBP). Design: Descriptive study using a repeated-measures design. Setting: A research laboratory within a rehabilitation center. Participants: Eighteen healthy subjects and 13 subjects with CLBP were assessed in a single session to compare the 3 protocols. The protocols were an upright position test (UPP), a semicrouched lifting test (LIF), and the Sorensen fatigue test. Interventions: Not applicable. Main Outcome Measures: Moments of force and surface electromyography were recorded bilaterally from 4 homologous back muscles while the subjects performed static trunk extension efforts for each protocol. Fatigue was quantified by the slopes of the linear regression of electromyography time-series. Results: The back muscle fatigue and strength scores did not differ significantly for the 2 subject groups for any of the 3 protocols. The electromyography fatigue indices revealed that the Sorensen fatigue test and UPP produced more fatigue in the back muscles than the LIF. Conclusions: It was impossible to specify which protocol is more sensitive to low back status because no between-group difference was observed for any of the 3 tests. © 2005 by American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation.

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APA

Da Silva, R. A., Arsenault, A. B., Gravel, D., Larivière, C., & De Oliveira, E. (2005). Back muscle strength and fatigue in healthy and chronic low back pain subjects: A comparative study of 3 assessment protocols. Archives of Physical Medicine and Rehabilitation, 86(4), 722–729. https://doi.org/10.1016/j.apmr.2004.08.007

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