Algorithm for Extracting Initial and Terminal Contact Timings during Treadmill Running using Inertial Sensors

Laura Prijot, Cédric Schwartz, Julien Watrin, Alex Mendes, Jean-Louis Croisier, Bénédicte Forthomme, Vincent Denoël, Olivier Brüls, Mohamed Boutaayamou, Mohamed Boutaayamou

2020

Abstract

Inertial measurement units (IMUs) are now considered as an economical solution for long term assessment in real conditions. However, their use in running gait analysis is relatively new and limited. Detecting the timing at which the foot strikes the ground (initial contact, IC) and the timing at which the foot leaves the ground (terminal contact, TC) gives access to many relevant temporal parameters such as stance, swing or stride durations. In this paper, we present an original algorithm to extract IC and TC timings and associated parameters from running data. These data have been measured using a newly developed IMU-based hardware system in ten asymptotic participants who ran at three speeds (slow, normal, and fast) with different running patterns (natural, rearfoot strike, mid-foot strike, and forefoot strike). This algorithm has been validated against a 200 Hz video camera based on 7056 IC and TC timings and 6861 temporal parameters. This algorithm extracted ICs and TCs with an accuracy and precision of (median [1st quartile; 3rd quartile]) 5 ms [-5 ms, 15 ms] and 0 ms [-5 ms, 5 ms], respectively. The relative errors in the extraction of stride and stance durations are -1.56 ± 3.00% and 0.00 ± 1.32%, respectively.

Paper Citation

in Harvard Style

Prijot L., Schwartz C., Watrin J., Mendes A., Croisier J., Forthomme B., Denoël V., Brüls O. and Boutaayamou M. (2020). Algorithm for Extracting Initial and Terminal Contact Timings during Treadmill Running using Inertial Sensors. In Proceedings of the 13th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2020) - Volume 4: BIOSIGNALS; ISBN 978-989-758-398-8, SciTePress, pages 258-265. DOI: 10.5220/0008983402580265

in Bibtex Style

@conference{biosignals20,
author={Laura Prijot and Cédric Schwartz and Julien Watrin and Alex Mendes and Jean-Louis Croisier and Bénédicte Forthomme and Vincent Denoël and Olivier Brüls and Mohamed Boutaayamou},
title={Algorithm for Extracting Initial and Terminal Contact Timings during Treadmill Running using Inertial Sensors},
booktitle={Proceedings of the 13th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2020) - Volume 4: BIOSIGNALS},
year={2020},
pages={258-265},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008983402580265},
isbn={978-989-758-398-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 13th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2020) - Volume 4: BIOSIGNALS
TI - Algorithm for Extracting Initial and Terminal Contact Timings during Treadmill Running using Inertial Sensors
SN - 978-989-758-398-8
AU - Prijot L.
AU - Schwartz C.
AU - Watrin J.
AU - Mendes A.
AU - Croisier J.
AU - Forthomme B.
AU - Denoël V.
AU - Brüls O.
AU - Boutaayamou M.
PY - 2020
SP - 258
EP - 265
DO - 10.5220/0008983402580265
PB - SciTePress