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dc.contributor.authorMelzer, Itshaken_US
dc.contributor.authorShtilman, Irenaen_US
dc.contributor.authorRosenblatt, Noahen_US
dc.contributor.authorOddsson, Lars IEen_US
dc.date.accessioned2012-01-12T17:42:02Z
dc.date.available2012-01-12T17:42:02Z
dc.date.copyright2007en_US
dc.date.issued2007-5-29en_US
dc.identifier.citationMelzer, Itshak, Irena Shtilman, Noah Rosenblatt, Lars IE Oddsson. "Reliability of voluntary step execution behavior under single and dual task conditions" Journal of NeuroEngineering and Rehabilitation 4:16. (2007)en_US
dc.identifier.issn1743-0003en_US
dc.identifier.urihttps://hdl.handle.net/2144/3424
dc.description.abstractBACKGROUND The current study investigated the repeatability (test-retest reliability) of ground reaction force parameters recorded during a voluntary step execution under single (motor task) and dual task (motor and cognitive task) conditions for healthy adults and elderly individuals as well as the number of trials required to produce repeatable results. METHODS Twenty-four healthy adults (21–63 years old) and 16 elderly adults (66–87 years) performed a voluntary rapid step execution following a tap on their heel while standing on a force platform under single and dual task conditions on three separate occasions. The first two tests were performed 30–60 minutes apart and the third test was performed a week later. Variables analyzed from the ground reaction force data included onset latency of step initiation (initiation phase), preparation and swing phases, foot-off and foot-contact times. RESULTS Intraclass correlation coefficients (ICC(2,1)) were good to excellent across all parameters and test conditions for the pooled population and for elderly (0.74–0.92 and 0.62–0.88, respectively) except for the swing phase duration where lower values were seen (0.54–0.60 and 0.32–0.64 respectively). Values were similar under single and dual task conditions. CONCLUSION A voluntary step execution test, performed under single and dual task conditions especially foot-off and foot-contact times, is a reliable outcome measure that may be a useful tool to asses dynamic balance function for diagnostic purposes as well as clinical intervention trials.en_US
dc.description.sponsorshipRetirement Research Foundation; National Institute on Disability and Rehabilitation Researchen_US
dc.language.isoenen_US
dc.publisherBioMed Centralen_US
dc.rightsCopyright 2007 Melzer et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/2.0en_US
dc.titleReliability of Voluntary Step Execution Behavior under Single and Dual Task Conditionsen_US
dc.typeArticleen_US
dc.identifier.doi10.1186/1743-0003-4-16en_US
dc.identifier.pmid17535424en_US
dc.identifier.pmcid1894973en_US


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Copyright 2007 Melzer et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as Copyright 2007 Melzer et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.