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Title: A three-pressure-sensor (3PS) system for monitoring ankle supination torque during sport motions
Authors: Fong, Daniel Tik-Pui
Chan, Yue-Yan
Hong, Youlian
Yung, Patrick Shu-Hang
Fung, Kwai-Yau
Chan, Kai-Ming
Keywords: Ankle sprain
Biomechanics
Joint moment
Kinetics
Inversion
Issue Date: 2008
Publisher: © Elsevier
Citation: FONG, D. ... et al., 2008. A three-pressure-sensor (3PS) system for monitoring ankle supination torque during sport motions. Journal of Biomechanics, 41 (11), pp.2562-2566.
Abstract: This study presented a three-pressure-sensor (3PS) system for monitoring ankle supination torque during sport motions. Five male subjects wore a pair of cloth sport shoes and performed 10 trials of walking, running, cutting, vertical jump-landing and stepping-down motions in a random sequence. A pair of pressure insoles (Novel Pedar model W, Germany) was inserted in the shoes for the measurement of plantar pressure at 100 Hz. The ankle joint torque was calculated by a standard lower extremity inverse dynamic calculation procedure with the data obtained by a motion capture system (VICON, UK) and a force plate (AMTI, USA), and was presented in a supination/pronation plane with an oblique axis of rotation at the ankle joint. Stepwise linear regression analysis suggested that pressure data at three locations beneath the foot were essential for reconstructing the ankle supination torque. Another group of five male subjects participated in a validation test with the same procedure, but with the pressure insoles replaced by the 3PS system. Estimated ankle supination torque was calculated from the equation developed by the regression analysis. Results suggested that the correlation between the standard and estimated data was high (R=0.938). The overall root mean square error was 6.91 N m, which was about 6% of the peak values recorded in the five sport motions (113 N m). With the good estimation accuracy, tiny size and inexpensive cost, the 3PS system is readily available to be implanted in sport shoe for the estimation and monitoring of ankle supination torque during dynamic sport motions.
Sponsor: This study was financially supported by the Innovation Technology Fund from the Innovation and Technology Commission, Hong Kong Special Administrative Region Government, Project no. ITS/015/06.
Version: Accepted for publication
DOI: 10.1016/j.jbiomech.2008.05.035
URI: https://dspace.lboro.ac.uk/2134/21251
Publisher Link: http://dx.doi.org/10.1016/j.jbiomech.2008.05.035
ISSN: 0021-9290
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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