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BioMed Research International
Volume 2014 (2014), Article ID 348659, 11 pages
http://dx.doi.org/10.1155/2014/348659
Research Article

Accuracy and Repeatability of the Gait Analysis by the WalkinSense System

1Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sports, University of Porto, Rua Dr. Plácido Costa 91, 4200 450 Porto, Portugal
2Department of Physiotherapy, Activity and Human Movement Study Centre, School of Allied Health Science, Polytechnic Institute of Porto, Rua Valente Perfeito 322, 4400-330 Vila Nova de Gaia, Portugal
3Porto Biomechanics Laboratory, University of Porto, Rua Dr. Plácido Costa 91, 4200 450 Porto, Portugal
4University of Rome “Foro Italico,” Piazza Lauro de Bosis 6, 00135 Roma, Italy

Received 25 October 2013; Revised 12 January 2014; Accepted 13 January 2014; Published 20 February 2014

Academic Editor: P. J. Oefner

Copyright © 2014 Marcelo P. de Castro et al. 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

WalkinSense is a new device designed to monitor walking. The aim of this study was to measure the accuracy and repeatability of the gait analysis performed by the WalkinSense system. Descriptions of values recorded by WalkinSense depicting typical gait in adults are also presented. A bench experiment using the Trublu calibration device was conducted to statically test the WalkinSense. Following this, a dynamic test was carried out overlapping the WalkinSense and the Pedar insoles in 40 healthy participants during walking. Pressure peak, pressure peak time, pressure-time integral, and mean pressure at eight-foot regions were calculated. In the bench experiments, the repeatability (i) among the WalkinSense sensors (within), (ii) between two WalkinSense devices, and (iii) between the WalkinSense and the Trublu devices was excellent. In the dynamic tests, the repeatability of the WalkinSense (i) between stances in the same trial (within-trial) and (ii) between trials was also excellent (ICC > 0.90). When the eight-foot regions were analyzed separately, the within-trial and between-trials repeatability was good-to-excellent in 88% (ICC > 0.80) of the data and fair in 11%. In short, the data suggest that the WalkinSense has good-to-excellent levels of accuracy and repeatability for plantar pressure variables.