Reliability of Voluntary Step Execution Behavior under Single and Dual Task ConditionsReport as inadecuate

Reliability of Voluntary Step Execution Behavior under Single and Dual Task Conditions

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Melzer, 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


BACKGROUNDThe 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. METHODSTwenty-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. RESULTSIntraclass correlation coefficients ICC2,1 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. CONCLUSIONA 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.Rights

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, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

NeuroMuscular Research Center Papers -

Author: Melzer, Itshak - Shtilman, Irena - Rosenblatt, Noah - Oddsson, Lars IE - -


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