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Title: A motion analysis marker-based method of determining centre of pressure during two-legged hopping
Authors: Furlong, Laura-Anne
Harrison, Andrew J.
Keywords: Kinematics
Inverse dynamics
Force plate
Hopping frequency
Issue Date: 2014
Publisher: © Elsevier
Citation: FURLONG, L-A. and HARRISON, A.J., 2014. A motion analysis marker-based method of determining centre of pressure during two-legged hopping. Journal of Biomechanics, 47(8), pp. 1904-1908.
Abstract: The fixed position of force plates has led researchers to pursue alternative methods of determining centre of pressure (CoP) location. To date, errors reported using alternative methods to the force plate during dynamic tasks have been high. The aim of this study was to investigate the accuracy of a motion analysis marker-based system to determine CoP during a two-legged hopping task. Five markers were attached to the left and right feet of eight healthy adults (5 females, 3 males, age: 25.0 ±2.8 years, height: 1.75 ±0.07 m, mass: 71.3 ±11.3 kg). Multivariate forward stepwise and forced entry linear regression was used with data from five participants to determine CoP position during quiet standing and hopping task at various frequencies. Maximum standard error of the estimate of CoP position was 12 mm in the anteroposterior direction and 8 mm in the mediolateral. Cross-validation was performed using the remaining three participants. Maximum root mean square difference between the force plate and marker method was 14 mm for mediolateral CoP and 20 mm for anteroposterior CoP during 1.5 Hz hopping. Differences reduced to a maximum of 7 mm (mediolateral) and 14 mm (anteroposterior) for the other frequencies. The smallest difference in calculated sagittal plane ankle moment and timing of maximum moment was during 3.0 Hz hopping, and largest at 1.5 Hz. Results indicate the marker-based method of determining CoP may be a suitable alternative to a force plate to determine CoP position during a two-legged hopping task at frequencies greater than 1.5 Hz.
Description: This paper was accepted for publication in the journal Journal of Biomechanics and the definitive published version is available at http://dx.doi.org/10.1016/j.jbiomech.2014.04.008
Sponsor: The Irish Research Council provided funding to support this work under the Embark Initiative.
Version: Accepted for publication
DOI: 10.1016/j.jbiomech.2014.04.008
URI: https://dspace.lboro.ac.uk/2134/25220
Publisher Link: http://dx.doi.org/10.1016/j.jbiomech.2014.04.008
ISSN: 0021-9290
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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