Agreement between the spatiotemporal gait parameters from two different wearable devices and high-speed video analysis

Autoři: Felipe García-Pinillos aff001;  Pedro Á. Latorre-Román aff002;  Víctor M. Soto-Hermoso aff003;  Juan A. Párraga-Montilla aff002;  Antonio Pantoja-Vallejo aff004;  Rodrigo Ramírez-Campillo aff005;  Luis E. Roche-Seruendo aff006
Působiště autorů: Department of Physical Education, Sports and Recreation, Universidad de La Frontera, Temuco, Chile aff001;  Department of Corporal Expression, University of Jaen, Jaen, Spain aff002;  Sport and Health University Research Center (iMUDS), University of Granada, Granada, Spain aff003;  Department of Pedagogy, University of Jaen, Jaen, Spain aff004;  Laboratory of Human Performance, Quality of Life and Wellness Research Group, Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile aff005;  Universidad San Jorge, Villanueva de Gallego, Zaragoza, Spain aff006
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
doi: 10.1371/journal.pone.0222872


This study aimed to evaluate the concurrent validity of two different inertial measurement units for measuring spatiotemporal parameters during running on a treadmill, by comparing data with a high-speed video analysis (VA) at 1,000 Hz. Forty-nine endurance runners performed a running protocol on a treadmill at comfortable velocity (i.e., 3.25 ± 0.36 m.s-1). Those wearable devices (i.e., Stryd™ and RunScribe™ systems) were compared to a high-speed VA, as a reference system for measuring spatiotemporal parameters (i.e. contact time [CT], flight time [FT], step frequency [SF] and step length [SL]) during running at comfortable velocity. The pairwise comparison revealed that the Stryd™ system underestimated CT (5.2%, p < 0.001) and overestimated FT (15.1%, p < 0.001) compared to the VA; whereas the RunScribe™ system underestimated CT (2.3%, p = 0.009). No significant differences were observed in SF and SL between the wearable devices and VA. The intra class correlation coefficient (ICC) revealed an almost perfect association between both systems and high-speed VA (ICC > 0.81). The Bland-Altman plots revealed heteroscedasticity of error (r2 = 0.166) for the CT from the Stryd™ system, whereas no heteroscedasticity of error (r2 < 0.1) was revealed in the rest of parameters. In conclusion, the results obtained suggest that both foot pods are valid tools for measuring spatiotemporal parameters during running on a treadmill at comfortable velocity. If the limits of agreement of both systems are considered in respect to high-speed VA, the RunScribe™ seems to be a more accurate system for measuring temporal parameters and SL than the Stryd™ system.

Klíčová slova:

Accelerometers – Equipment – Gait analysis – Inertia – Measurement equipment – Research validity – Running – Feet


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