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Stroke Research and Treatment
Volume 2014, Article ID 683681, 8 pages
http://dx.doi.org/10.1155/2014/683681
Research Article

Sit-to-Stand in People with Stroke: Effect of Lower Limb Constraint-Induced Movement Strategies

School of Rehabilitation Therapy, Queen’s University, Kingston, ON, Canada K7L 3N6

Received 25 November 2013; Revised 30 January 2014; Accepted 31 January 2014; Published 16 March 2014

Academic Editor: Alexander C. H. Geurts

Copyright © 2014 Charla Krystine Gray and Elsie Culham. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Weight-bearing asymmetry and impaired balance may contribute to the increased fall risk in people with stroke when rising to stand from sitting. Objective. This study investigated the effect of constraint-induced movement (CIM) strategies on weight-bearing symmetry and balance during sit-to-stand in people with stroke. Methods. A nonrandom convenience sample of fifteen people with stroke performed the sit-to-stand task using three CIM strategies including a solid or compliant (foam) block strategy, with the unaffected limb placed on the block, and an asymmetrical foot position strategy, with the unaffected limb placed ahead of the affected limb. Duration of the task, affected limb weight-bearing, and centre of pressure and centre of mass displacement were measured in the frontal and sagittal plane. Results. Affected limb weight-bearing was increased and frontal plane centre of pressure and centre of mass moved toward the affected limb compared to baseline with all CIM strategies. Centre of mass displacement in the sagittal plane was greater with the compliant block and asymmetrical foot strategies. Conclusions. The CIM strategies demonstrated greater loading of the affected limb and movement of the centre of pressure and centre of mass toward the affected limb. The compliant block and asymmetrical foot conditions may challenge sagittal plane balance during sit-to-stand in people with stroke.