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Open AccessArticle

Hurdle Clearance Detection and Spatiotemporal Analysis in 400 Meters Hurdles Races Using Shoe-Mounted Magnetic and Inertial Sensors

1
Laboratory of Movement Analysis and Measurement, EPFL, 1015 Lausanne, Switzerland
2
Institute of Sport Science, University of Innsbruck, 6020 Innsbruck, Austria
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(2), 354; https://doi.org/10.3390/s20020354
Received: 28 November 2019 / Revised: 20 December 2019 / Accepted: 4 January 2020 / Published: 8 January 2020
This research aimed to determine whether: (1) shoe-worn magnetic and inertial sensors can be used to detect hurdle clearance and identify the leading leg in 400-m hurdles, and (2) to provide an analysis of the hurdlers’ spatiotemporal parameters in the intervals defined by the hurdles’ position. The data set is composed of MIMU recordings of 15 athletes in a competitive environment. The results show that the method based on the duration of the flight phase was able to detect hurdle clearance and identify the leading leg with 100% accuracy. Moreover, by combining the swing phase duration with the orientation of the foot, we achieved, in unipedal configuration, 100% accuracy in hurdle clearance detection, and 99.7% accuracy in the identification of the leading leg. Finally, this study provides statistical evidence that contact time significantly increases, while speed and step frequency significantly decrease with time during 400 m hurdle races. View Full-Text
Keywords: inertial sensors; 400 m hurdles; magnetometer; hurdle clearance; IMU; flight time; speed inertial sensors; 400 m hurdles; magnetometer; hurdle clearance; IMU; flight time; speed
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Falbriard, M.; Mohr, M.; Aminian, K. Hurdle Clearance Detection and Spatiotemporal Analysis in 400 Meters Hurdles Races Using Shoe-Mounted Magnetic and Inertial Sensors. Sensors 2020, 20, 354.

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