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dc.contributor.authorGarcía Pinillos, Felipe 
dc.contributor.authorSoto Hermoso, Víctor Manuel 
dc.date.accessioned2021-01-26T11:51:38Z
dc.date.available2021-01-26T11:51:38Z
dc.date.issued2020-10-23
dc.identifier.citationGarcía-Pinillos, F., Jaén-Carrillo, D., Hermoso, V. S., Román, P. L., Delgado, P., Martinez, C., ... & Seruendo, L. R. (2020). Agreement Between Spatiotemporal Gait Parameters Measured by a Markerless Motion Capture System and Two Reference Systems—a Treadmill-Based Photoelectric Cell and High-Speed Video Analyses: Comparative Study. JMIR mHealth and uHealth, 8(10), e19498. [doi: 10.2196/19498]es_ES
dc.identifier.urihttp://hdl.handle.net/10481/66024
dc.description.abstractBackground: Markerless systems to capture body motion require no markers to be attached to the body, thereby improving clinical feasibility and testing time. However, the lack of markers might affect the accuracy of measurements. Objective: This study aimed to determine the absolute reliability and concurrent validity of the Kinect system with MotionMetrix software for spatiotemporal variables during running at a comfortable velocity, by comparing data between the combination system and two widely used systems—OptoGait and high-speed video analysis at 1000 Hz. Methods: In total, 25 runners followed a running protocol on a treadmill at a speed of 12 km/h. The Kinect+MotionMetrix combination measured spatiotemporal parameters during running (ie, contact time, flight time, step frequency, and step length), which were compared to those obtained from two reference systems. Results: Regardless of the system, flight time had the highest coefficients of variation (OptoGait: 16.4%; video analysis: 17.3%; Kinect+MotionMetrix: 23.2%). The rest of the coefficients of variation reported were lower than 8.1%. Correlation analysis showed very high correlations (r>0.8; P<.001) and almost perfect associations (intraclass correlation coefficient>0.81) between systems for all the spatiotemporal parameters except contact time, which had lower values. Bland-Altman plots revealed smaller systematic biases and random errors for step frequency and step length and larger systematic biases and random errors for temporal parameters with the Kinect+MotionMetrix system as compared to OptoGait (difference: contact time +3.0%, flight time −7.9%) and high-speed video analysis at 1000 Hz (difference: contact time +4.2%, flight time −11.3%). Accordingly, heteroscedasticity was found between systems for temporal parameters (r2>0.1). Conclusions: The results indicate that the Kinect+MotionMetrix combination slightly overestimates contact time and strongly underestimates flight time as compared to the OptoGait system and high-speed video analysis at 1000 Hz. However, it is a valid tool for measuring step frequency and step length when compared to reference systems. Future studies should determine the reliability of this system for determining temporal parameters.es_ES
dc.language.isoenges_ES
dc.publisherJmir Publicationses_ES
dc.rightsAtribución 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subjectOptoGaites_ES
dc.subjectRunnerses_ES
dc.subjectSports technologyes_ES
dc.subjectValidityes_ES
dc.subjectGaites_ES
dc.subjectMotion capturees_ES
dc.subjectVideoes_ES
dc.subjectFeasibilityes_ES
dc.subjectAccuracyes_ES
dc.subjectKinectes_ES
dc.titleAgreement Between Spatiotemporal Gait Parameters Measured by a Markerless Motion Capture System and Two Reference Systems—a Treadmill-Based Photoelectric Cell and High-Speed Video Analyses: Comparative Studyes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.doi10.2196/19498
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones_ES


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