The Zibrio SmartScale is a low-cost, portable force platform designed to perform an objective assessment of postural stability. The purpose of the present study was to validate the center of pressure (COP) measurements in the Zibrio SmartScale. Simultaneous COP data was collected by a Zibrio SmartScale and a laboratory-grade force platform (LFP) under the dynamic motion of an inverted pendulum device intended to mimic the sway of a standing human. The inverted pendulum was placed on the Zibrio SmartScale which was placed on the LFP. The pendulum was then displaced to angles of 3° and 5° in both the anterior-posterior (AP) and medial–lateral (ML) directions. The findings of this study show low mean average error (MAE) among the measures taken simultaneously upon the LFP and Zibrio SmartScale with no appreciable difference in error in either AP or ML COP directions. Averaged over repeated trials, the MAE did not surpass 0.5 mm. This represented 0.4% of the total range (±50 to 60 mm in 5° displacement trials) of simulated COP. The results of this study strongly indicate that the Zibrio SmartScale can perform adequately as a light-weight and low-cost alternative method of COP measurement in comparison to a traditional LFP.
|Number of pages||5|
|Journal||Journal of Biomechanics|
|State||Published - Jun 11 2019|
Bibliographical noteFunding Information:
Zibrio Inc. , a privately held company, provided financial support for this study. No external funding was provided for this study. Dr. Layne and the University of Houston received no funding support for this study and the equipment borrowed from the University of Houston was provided at no cost through an equipment loan agreement.
The authors would like to thank the University of Houston's Center for Neuromotor and Biomechanics Research (CNBR) for providing the laboratory force plate used in this study. Zibrio Inc., a privately held company, provided financial support for this study. No external funding was provided for this study. Dr. Layne and the University of Houston received no funding support for this study and the equipment borrowed from the University of Houston was provided at no cost through an equipment loan agreement.
© 2019 Elsevier Ltd
- Center of pressure
- Force platform
- Postural sway
ASJC Scopus subject areas
- Biomedical Engineering
- Orthopedics and Sports Medicine