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KMID : 1211620160110040085
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Journal of the Korean Society of Physical Medicine
2016 Volume.11 No. 4 p.85 ~ p.92
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Validity of Ground Reaction Forces during Gait and Sit-to-Stand using the Nintendo Wii Balance Board in Healthy Subjects
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Jeong Yu-Jin
Park Dae-Sung
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Abstract
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PURPOSE: A good, valid, and feasible tool for evaluating sit to stand (STS) is needed to help clinicians quantify the STS ability of stroke patients and people with balance disorders. The purpose of this study was to evaluate the concurrent validity of the Nintendo Wii Balance Board (WBB) and a force plate during STS and gait.
METHODS: Seventeen healthy adults performed five trials of STS and gait on the WBB placed on the force plate. The force plate and the WBB were compared in regard to center of pressure (COP) and ground reaction force (GRF) data that were collected simultaneously. The variables used for analysis were time (s), integral summation (%), COP path length (㎜), COP x range, and COP y range, all of which were measured for both tasks. Counter (%), peak (%), and rebound (%) were analyzed for STS, and 1st peak (%), min peak (%), and 2nd peak (%) were analyzed for gait. The concurrent validity was analyzed using an intraclass correlation coefficient (ICC) and a standard error of measurement (SEM) with a 95% confidence interval.
RESULTS: The concurrent validity of the WBB for STS ranged from fair to good (ICC=.701∼.994, SEM=.029∼3.815). The concurrent validity for gait was good (ICC=.869 ∼.989, SEM=.007∼2.052) aside from path length and x and y ranges of COP (ICC=-.150∼.371, SEM=3.635∼4.142).
CONCLUSION: The GRF of the WBB has a good validity for STS and gait analysis. The WBB is remarkably portable, easy to use, and convenient for clinically assessing STS and gait.
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KEYWORD
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Sit to Stand, Gait, Forceplate, Nintendo Wii balance board, Ground reaction force, Center of pressure
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