Individual limb mechanical analysis of gait following stroke

Mahon, Caitlin E, Farris, Dominic J, Sawicki, Gregory S and Lewek, Michael D (2015) Individual limb mechanical analysis of gait following stroke. Journal of Biomechanics, 48 6: 984-989. doi:10.1016/j.jbiomech.2015.02.006

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Author Mahon, Caitlin E
Farris, Dominic J
Sawicki, Gregory S
Lewek, Michael D
Title Individual limb mechanical analysis of gait following stroke
Journal name Journal of Biomechanics   Check publisher's open access policy
ISSN 1873-2380
Publication date 2015-04-13
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jbiomech.2015.02.006
Open Access Status File (Author Post-print)
Volume 48
Issue 6
Start page 984
End page 989
Total pages 6
Place of publication Oxford, United Kingdom
Publisher Pergamon Press (Elsevier Science)
Collection year 2016
Abstract The step-to-step transition of walking requires significant mechanical and metabolic energy to redirect the center of mass. Inter-limb mechanical asymmetries during the step-to-step transition may increase overall energy demands and require compensation during single-support. The purpose of this study was to compare individual limb mechanical gait asymmetries during the step-to-step transitions, single-support and over a complete stride between two groups of individuals following stroke stratified by gait speed (≥0.8 m/s or <0.8 m/s). Twenty-six individuals with chronic stroke walked on an instrumented treadmill to collect ground reaction force data. Using the individual limbs method, mechanical power produced on the center of mass was calculated during the trailing double-support, leading double-support, and single-support phases of a stride, as well as over a complete stride. Robust inter-limb asymmetries in mechanical power existed during walking after stroke; for both groups, the non-paretic limb produced significantly more positive net mechanical power than the paretic limb during all phases of a stride and over a complete stride. Interestingly, no differences in inter-limb mechanical power asymmetry were noted between groups based on walking speed, during any phase or over a complete stride. Paretic propulsion, however, was different between speed-based groups. The fact that paretic propulsion (calculated from anterior–posterior forces) is different between groups, but our measure of mechanical work (calculated from all three directions) is not, suggests that limb power output may be dominated by vertical components, which are required for upright support.
Keyword Stroke
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Human Movement and Nutrition Sciences Publications
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