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The Validity of a Three-Dimensional Motion Capture System and the Garmin Running Dynamics Pod in Connection with an Assessment of Ground Contact Time While Running in Place
Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia.
Department of Health Sciences, Mid Sweden University, 83125 Östersund, Sweden.
Luleå University of Technology, Department of Health, Education and Technology, Health, Medicine and Rehabilitation. School of Kinesiology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.ORCID iD: 0000-0002-3814-6246
Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia; Department of Health Sciences, Mid Sweden University, 83125 Östersund, Sweden.
2023 (English)In: Sensors, E-ISSN 1424-8220, Vol. 23, no 16, article id 7155Article in journal (Refereed) Published
Abstract [en]

A three-dimensional motion capture system (MoCap) and the Garmin Running Dynamics Pod can be utilised to monitor a variety of dynamic parameters during running. The present investigation was designed to examine the validity of these two systems for determining ground contact times while running in place by comparing the values obtained with those provided by the bilateral force plate (gold standard). Eleven subjects completed three 20-s runs in place at self-selected rates, starting slowly, continuing at an intermediate pace, and finishing rapidly. The ground contact times obtained with both systems differed significantly from the gold standard at all three rates, as well as for all the rates combined (p < 0.001 in all cases), with the smallest mean bias at the fastest step rate for both (11.5 ± 14.4 ms for MoCap and −81.5 ± 18.4 ms for Garmin). This algorithm was developed for the determination of ground contact times during normal running and was adapted here for the assessment of running in place by the MoCap, which could be one explanation for its lack of validity. In conclusion, the wearables developed for monitoring normal running cannot be assumed to be suitable for determining ground contact times while running in place.

Place, publisher, year, edition, pages
Multidisciplinary Digital Publishing Institute (MDPI) , 2023. Vol. 23, no 16, article id 7155
Keywords [en]
3D kinematics, accelerometer, force plate, IMU, inertial sensor, performance, wearables
National Category
Other Health Sciences
Research subject
Physiotherapy; Centre - Centre for Sports and Performance Technology (SPORTC)
Identifiers
URN: urn:nbn:se:ltu:diva-101253DOI: 10.3390/s23167155ISI: 001061363300001Scopus ID: 2-s2.0-85168780467OAI: oai:DiVA.org:ltu-101253DiVA, id: diva2:1794995
Funder
EU, Horizon 2020, 824984
Note

Validerad;2023;Nivå 2;2023-09-07 (joosat);

Funder: Slovenian Research Agency (grant number P5-0147);

CC BY 4.0 License

Available from: 2023-09-07 Created: 2023-09-07 Last updated: 2024-03-25Bibliographically approved

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Holmberg, Hans-Christer

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