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Article

Does the Position of Foot-Mounted IMU Sensors Influence the Accuracy of Spatio-Temporal Parameters in Endurance Running?

1
Machine Learning and Data Analytics Lab, Department of Computer Science, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany
2
Finance & IT - IT Innovation, Adidas AG, 91074 Herzogenaurach, Germany
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(19), 5705; https://doi.org/10.3390/s20195705
Received: 15 September 2020 / Revised: 2 October 2020 / Accepted: 4 October 2020 / Published: 7 October 2020
(This article belongs to the Special Issue Technologies for Sports Engineering and Analytics)
Wearable sensor technology already has a great impact on the endurance running community. Smartwatches and heart rate monitors are heavily used to evaluate runners’ performance and monitor their training progress. Additionally, foot-mounted inertial measurement units (IMUs) have drawn the attention of sport scientists due to the possibility to monitor biomechanically relevant spatio-temporal parameters outside the lab in real-world environments. Researchers developed and investigated algorithms to extract various features using IMU data of different sensor positions on the foot. In this work, we evaluate whether the sensor position of IMUs mounted to running shoes has an impact on the accuracy of different spatio-temporal parameters. We compare both the raw data of the IMUs at different sensor positions as well as the accuracy of six endurance running-related parameters. We contribute a study with 29 subjects wearing running shoes equipped with four IMUs on both the left and the right shoes and a motion capture system as ground truth. The results show that the IMUs measure different raw data depending on their position on the foot and that the accuracy of the spatio-temporal parameters depends on the sensor position. We recommend to integrate IMU sensors in a cavity in the sole of a running shoe under the foot’s arch, because the raw data of this sensor position is best suitable for the reconstruction of the foot trajectory during a stride. View Full-Text
Keywords: wearable computing; foot kinematics; sensor position; zero velocity update; inertial measurement unit; sport science; running wearable computing; foot kinematics; sensor position; zero velocity update; inertial measurement unit; sport science; running
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MDPI and ACS Style

Zrenner, M.; Küderle, A.; Roth, N.; Jensen, U.; Dümler, B.; Eskofier, B.M. Does the Position of Foot-Mounted IMU Sensors Influence the Accuracy of Spatio-Temporal Parameters in Endurance Running? Sensors 2020, 20, 5705. https://doi.org/10.3390/s20195705

AMA Style

Zrenner M, Küderle A, Roth N, Jensen U, Dümler B, Eskofier BM. Does the Position of Foot-Mounted IMU Sensors Influence the Accuracy of Spatio-Temporal Parameters in Endurance Running? Sensors. 2020; 20(19):5705. https://doi.org/10.3390/s20195705

Chicago/Turabian Style

Zrenner, Markus, Arne Küderle, Nils Roth, Ulf Jensen, Burkhard Dümler, and Bjoern M. Eskofier 2020. "Does the Position of Foot-Mounted IMU Sensors Influence the Accuracy of Spatio-Temporal Parameters in Endurance Running?" Sensors 20, no. 19: 5705. https://doi.org/10.3390/s20195705

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