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Proceedings Paper

Use of accelerometers for detecting foot-ground contact time during running
Author(s): Brendan Purcell; Justin Channells; Daniel James; Rod Barrett
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Paper Abstract

A biomechanical variable of interest to sprint coaches is foot-ground contact time. Contact time can be easily measured in a laboratory environment using a force platform, but is difficult to measure in the field. The focus of this paper is on the development and validation of an accelerometer-based method for estimating contact time during sprinting that could be used in the field. Tri-axial accelerometers were mounted on the tibia of the right leg of 6 subjects who performed maximal running trials from a stationary start, and running trials at a range of steady state speeds (jog, run and sprint). Ground contact times were measured using a force platform, and estimated from 3D accelerometer data. The mean error between the force plate and accelerometer-based measures of contact time were 0 ± 12 ms, 2 ± 3 ms, and 1 ± 1 ms for the jog, run and sprint. For steps 1, 3 and 5 of the acceleration phase of the maximal sprint the mean errors were 8 ± 9 ms, 2 ± 5 ms, and 0 ± 1 ms respectively. Overall it was concluded from our analysis that close estimates of contact time during running can be obtained using body mounted accelerometers, with the best estimates obtained in conditions associated with the highest accelerations.

Paper Details

Date Published: 19 January 2006
PDF: 8 pages
Proc. SPIE 6036, BioMEMS and Nanotechnology II, 603615 (19 January 2006); doi: 10.1117/12.638389
Show Author Affiliations
Brendan Purcell, Griffith Univ. (Australia)
Centre for Wireless Monitoring and Applications, Griffith Univ. (Australia)
Queensland Academy of Sport (Australia)
Justin Channells, Centre of Excellence for Applied Sport Science Research, Griffith Univ. (Australia)
Queensland Academy of Sport (Australia)
Daniel James, Centre for Wireless Monitoring and Applications, Griffith Univ. (Australia)
Griffith Univ. (Australia)
Rod Barrett, Griffith Univ. (Australia)
Centre for Wireless Monitoring and Applications, Griffith Univ. (Australia)

Published in SPIE Proceedings Vol. 6036:
BioMEMS and Nanotechnology II
Dan V. Nicolau, Editor(s)

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