Technical Brief

Agreement Between the Spatiotemporal Gait Parameters of Healthy Adults From the OptoGait System and a Traditional Three-Dimensional Motion Capture System

[+] Author and Article Information
Aoife Healy

Staffordshire University,
School of Life Sciences and Education,
Staffordshire University,
Stoke On Trent ST4 2DF, UK
e-mail: a.healy@staffs.ac.uk

Kimberley Linyard-Tough

Staffordshire University,
School of Life Sciences and Education,
Staffordshire University,
Stoke On Trent ST4 2DF, UK
e-mail: kimberleymlt90@hotmail.co.uk

Nachiappan Chockalingam

Staffordshire University,
School of Life Sciences and Education,
Staffordshire University,
Stoke On Trent ST4 2DF, UK
e-mail: n.chockalingam@staffs.ac.uk

1Corresponding author.

Manuscript received February 6, 2018; final manuscript received September 26, 2018; published online October 22, 2018. Assoc. Editor: Paul Rullkoetter.

J Biomech Eng 141(1), 014501 (Oct 22, 2018) (4 pages) Paper No: BIO-18-1068; doi: 10.1115/1.4041619 History: Received February 06, 2018; Revised September 26, 2018

While previous research has assessed the validity of the OptoGait system to the GAITRite walkway and an instrumented treadmill, no research to date has assessed this system against a traditional three-dimensional motion analysis system. Additionally, previous research has shown that the OptoGait system shows systematic bias when compared to other systems due to the configuration of the system's hardware. This study examined the agreement between the spatiotemporal gait parameters calculated from the OptoGait system and a three-dimensional motion capture (14 camera Vicon motion capture system and 2 AMTI force plates) in healthy adults. Additionally, a range of filter settings for the OptoGait were examined to determine if it was possible to eliminate any systematic bias between the OptoGait and the three-dimensional motion analysis system. Agreement between the systems was examined using 95% limits of agreement by Bland and Altman and the intraclass correlation coefficient. A repeated measure ANOVA was used to detect any systematic differences between the systems. Findings confirm the validity of the OptoGait system for the evaluation of spatiotemporal gait parameters in healthy adults. Furthermore, recommendations on filter settings which eliminate the systematic bias between the OptoGait and the three-dimensional motion analysis system are provided.

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Grahic Jump Location
Fig. 1

Testing setup with two force plates at the start of the 5 m OptoGait system

Grahic Jump Location
Fig. 2

OptoGait LED filter settings (a) 0 LED, (b) 1 LED, (c) 2 LED, and (d) 3 LED. These settings indicate the number of additional LED sensors they must be interrupted by the foot to trigger the start/end of the foot contact time.



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