Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.

This study examined the concurrent validity of an inverse dynamic (force computed from barbell acceleration [reference method]) and a work-energy (force computed from work at the barbell [alternative method]) approach to measure the mean vertical barbell force during the snatch using kinematic data...

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Autores principales:	Ingo Sandau, Helmi Chaabene, Urs Granacher
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a9fa0b54b27844308c3271f803f59d01
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spelling	oai:doaj.org-article:a9fa0b54b27844308c3271f803f59d012021-12-02T20:06:51ZConcurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.1932-620310.1371/journal.pone.0254705https://doaj.org/article/a9fa0b54b27844308c3271f803f59d012021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254705https://doaj.org/toc/1932-6203This study examined the concurrent validity of an inverse dynamic (force computed from barbell acceleration [reference method]) and a work-energy (force computed from work at the barbell [alternative method]) approach to measure the mean vertical barbell force during the snatch using kinematic data from video analysis. For this purpose, the acceleration phase of the snatch was analyzed in thirty male medal winners of the 2018 weightlifting World Championships (age: 25.2±3.1 years; body mass: 88.9±28.6 kg). Vertical barbell kinematics were measured using a custom-made 2D real-time video analysis software. Agreement between the two computational approaches was assessed using Bland-Altman analysis, Deming regression, and Pearson product-moment correlation. Further, principal component analysis in conjunction with multiple linear regression was used to assess whether individual differences related to the two approaches are due to the waveforms of the acceleration time-series data. Results indicated no mean difference (p > 0.05; d = -0.04) and an extremely large correlation (r = 0.99) between the two approaches. Despite the high agreement, the total error of individual differences was 8.2% (163.0 N). The individual differences can be explained by a multiple linear regression model (R2adj = 0.86) on principal component scores from the principal component analysis of vertical barbell acceleration time-series waveforms. Findings from this study indicate that the individual errors of force measures can be associated with the inverse dynamic approach. This approach uses vertical barbell acceleration data from video analysis that is prone to error. Therefore, it is recommended to use the work-energy approach to compute mean vertical barbell force as this approach did not rely on vertical barbell acceleration.Ingo SandauHelmi ChaabeneUrs GranacherPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254705 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ingo Sandau Helmi Chaabene Urs Granacher Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.
description	This study examined the concurrent validity of an inverse dynamic (force computed from barbell acceleration [reference method]) and a work-energy (force computed from work at the barbell [alternative method]) approach to measure the mean vertical barbell force during the snatch using kinematic data from video analysis. For this purpose, the acceleration phase of the snatch was analyzed in thirty male medal winners of the 2018 weightlifting World Championships (age: 25.2±3.1 years; body mass: 88.9±28.6 kg). Vertical barbell kinematics were measured using a custom-made 2D real-time video analysis software. Agreement between the two computational approaches was assessed using Bland-Altman analysis, Deming regression, and Pearson product-moment correlation. Further, principal component analysis in conjunction with multiple linear regression was used to assess whether individual differences related to the two approaches are due to the waveforms of the acceleration time-series data. Results indicated no mean difference (p > 0.05; d = -0.04) and an extremely large correlation (r = 0.99) between the two approaches. Despite the high agreement, the total error of individual differences was 8.2% (163.0 N). The individual differences can be explained by a multiple linear regression model (R2adj = 0.86) on principal component scores from the principal component analysis of vertical barbell acceleration time-series waveforms. Findings from this study indicate that the individual errors of force measures can be associated with the inverse dynamic approach. This approach uses vertical barbell acceleration data from video analysis that is prone to error. Therefore, it is recommended to use the work-energy approach to compute mean vertical barbell force as this approach did not rely on vertical barbell acceleration.
format	article
author	Ingo Sandau Helmi Chaabene Urs Granacher
author_facet	Ingo Sandau Helmi Chaabene Urs Granacher
author_sort	Ingo Sandau
title	Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.
title_short	Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.
title_full	Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.
title_fullStr	Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.
title_full_unstemmed	Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.
title_sort	concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/a9fa0b54b27844308c3271f803f59d01
work_keys_str_mv	AT ingosandau concurrentvalidityofbarbellforcemeasuredfromvideobasedbarbellkinematicsduringthesnatchinmaleeliteweightlifters AT helmichaabene concurrentvalidityofbarbellforcemeasuredfromvideobasedbarbellkinematicsduringthesnatchinmaleeliteweightlifters AT ursgranacher concurrentvalidityofbarbellforcemeasuredfromvideobasedbarbellkinematicsduringthesnatchinmaleeliteweightlifters
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Concurrent validity of barbell force measured from video-based barbell kinematics during the snatch in male elite weightlifters.

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