Validity of a Local Positioning System during Outdoor and Indoor Conditions for Team Sports

Prisca S. Alt; Christian Baumgart; Olaf Ueberschär; Jürgen Freiwald; Matthias W. Hoppe

doi:10.3390/s20205733

journal article Open Access Oct 09, 2020

Validity of a Local Positioning System during Outdoor and Indoor Conditions for Team Sports

Prisca S. Alt Christian Baumgart

Olaf Ueberschär

Jürgen Freiwald Matthias W. Hoppe

Sensors Vol. 20 No. 20 pp. 5733 · MDPI AG

View at Publisher Save 10.3390/s20205733

Abstract

This study aimed to compare the validity of a local positioning system (LPS) during outdoor and indoor conditions for team sports. The impact of different filtering techniques was also investigated. Five male team sport athletes (age: 27 ± 2 years; maximum oxygen uptake: 48.4 ± 5.1 mL/min/kg) performed 10 trials on a team sport-specific circuit on an artificial turf and in a sports hall. During the circuit, athletes wore two devices of a recent 20-Hz LPS. From the reported raw and differently filtered velocity data, distances covered during different walking, jogging, and sprinting sections within the circuit were computed for which the circuit was equipped with double-light timing gates as criterion measures. The validity was determined by comparing the known and measured distances via the relative typical error of estimate (TEE). The LPS validity for measuring distances covered was good to moderate during both environments (TEE: 0.9–7.1%), whereby the outdoor validity (TEE: 0.9–6.4%) was superior than indoor validity (TEE: 1.2–7.1%). During both environments, validity outcomes of an unknown manufacturer filter were superior (TEE: 0.9–6.2%) compared to those of a standard Butterworth filter (TEE: 0.9–6.4%) and to unprocessed raw data (TEE: 1.0–7.1%). Our findings show that the evaluated LPS can be considered as a good to moderately valid tracking technology to assess running-based movement patterns in team sports during outdoor and indoor conditions. However, outdoor was superior to indoor validity, and also impacted by the applied filtering technique. Our outcomes should be considered for practical purposes like match and training analyses in team sport environments.

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Details

Published: Oct 09, 2020
Vol/Issue: 20(20)
Pages: 5733
License: View

Authors

P

Prisca S. Alt

Department of Orthopaedic and Traumatic Surgery, Clinic Braunschweig, 38118 Braunschweig, Germany

C

Christian Baumgart

Department of Movement and Training Science, University of Wuppertal, 42119 Wuppertal, Germany

O

Olaf Ueberschär

Department of Engineering and Industrial Design, Magdeburg-Stendal University of Applied Sciences, 39114 Magdeburg, Germany; Department of Biomechanics, Institute for Applied Training Science, 04109 Leipzig, Germany

J

Jürgen Freiwald

Department of Movement and Training Science, University of Wuppertal, 42119 Wuppertal, Germany

M

Matthias W. Hoppe

Institute of Movement and Training Science I, University of Leipzig, 04109 Leipzig, Germany

Cite This Article

Prisca S. Alt, Christian Baumgart, Olaf Ueberschär, et al. (2020). Validity of a Local Positioning System during Outdoor and Indoor Conditions for Team Sports. Sensors, 20(20), 5733. https://doi.org/10.3390/s20205733

Validity of a Local Positioning System during Outdoor and Indoor Conditions for Team Sports

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