Examinando por Autor "Soto Hermoso, Victor M."
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Ítem Agreement between the spatiotemporal gait parameters from two different wearable devices and high-speed video analy(Daniel Boullosa, University of Brasilia, BRAZIL, 2019-09-24) García-Pinillos, Felipe; Latorre Román, Pedro A.; Soto Hermoso, Victor M.; Párraga Montilla, Juan A.; Pantoja Vallejo, Antonio; Ramírez Campillo, Rodrigo; Roche-Seruendo, Luis E.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 highspeed 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.Ítem How Does Power During Running Change when Measured at Different Time Intervals?(Georg Thieme Verlag KG Stuttgart · New York, 2019) García Pinillos, Felipe; Soto Hermoso, Victor M.; Latorre Román, Pedro A.; Párraga Montilla, Juan A.; Roche Seruendo, Luis E.This study aimed to examine how the power output changes while running at a continuous comfortable velocity on a motorized treadmill by comparing running power averaged during different time intervals. Forty-nine endurance runners performed a running protocol on a treadmill at self-selected comfortable velocity. Power output (W) was estimated with the Stryd™ power meter, and it was examined over six recording intervals within the 3-min recording period: 0–10 s, 0–20 s, 0–30 s, 0–60 s, 0–120 s and 0–180 s. The ANOVAs showed no significant differences in the magnitude of the power output between the recording intervals (p = 0.276, F = 1.614, partial Eta2 = 0.155). An almost perfect association was also observed in the magnitude of the power output between the recording intervals (ICC ≥ 0.999). Bland-Altman plots revealed no heteroscedasticity of error for the power output in any of the between- intervals comparisons (r2 < 0.1), although longer recording intervals yield smaller systematic bias, random errors, and narrower limits of agreement for power output. The results show that power data during running, as measured through the Stryd™ system, is a stable metric with negligible differences, in practical terms, between shorter (i. e., 10, 20, 30, 60 or 120 s) and longer recording intervals (i. e., 180 s