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Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study

Biomechanical studies of winter sports are challenging due to environmental conditions which cannot be mimicked in a laboratory. In this study, a methodological approach was developed merging 2D video recordings with sensor-based motion capture to investigate ski jump landings. A reference measureme...

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Autores principales: Kurpiers, Nicolas, Petrone, Nicola, Supej, Matej, Wisser, Anna, Hansen, Jakob, Kersting, Uwe G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7374433/
https://www.ncbi.nlm.nih.gov/pubmed/32646033
http://dx.doi.org/10.3390/s20133805
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author Kurpiers, Nicolas
Petrone, Nicola
Supej, Matej
Wisser, Anna
Hansen, Jakob
Kersting, Uwe G.
author_facet Kurpiers, Nicolas
Petrone, Nicola
Supej, Matej
Wisser, Anna
Hansen, Jakob
Kersting, Uwe G.
author_sort Kurpiers, Nicolas
collection PubMed
description Biomechanical studies of winter sports are challenging due to environmental conditions which cannot be mimicked in a laboratory. In this study, a methodological approach was developed merging 2D video recordings with sensor-based motion capture to investigate ski jump landings. A reference measurement was carried out in a laboratory, and subsequently, the method was exemplified in a field study by assessing the effect of a ski boot modification on landing kinematics. Landings of four expert skiers were filmed under field conditions in the jump plane, and full body kinematics were measured with an inertial motion unit (IMU) -based motion capture suit. This exemplary study revealed that the combination of video and IMU data is viable. However, only one skier was able to make use of the added boot flexibility, likely due to an extended training time with the modified boot. In this case, maximum knee flexion changed by 36° and maximum ankle flexion by 13°, whereas the other three skiers changed only marginally. The results confirm that 2D video merged with IMU data are suitable for jump analyses in winter sports, and that the modified boot will allow for alterations in landing technique provided that enough time for training is given.
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spelling pubmed-73744332020-08-06 Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study Kurpiers, Nicolas Petrone, Nicola Supej, Matej Wisser, Anna Hansen, Jakob Kersting, Uwe G. Sensors (Basel) Letter Biomechanical studies of winter sports are challenging due to environmental conditions which cannot be mimicked in a laboratory. In this study, a methodological approach was developed merging 2D video recordings with sensor-based motion capture to investigate ski jump landings. A reference measurement was carried out in a laboratory, and subsequently, the method was exemplified in a field study by assessing the effect of a ski boot modification on landing kinematics. Landings of four expert skiers were filmed under field conditions in the jump plane, and full body kinematics were measured with an inertial motion unit (IMU) -based motion capture suit. This exemplary study revealed that the combination of video and IMU data is viable. However, only one skier was able to make use of the added boot flexibility, likely due to an extended training time with the modified boot. In this case, maximum knee flexion changed by 36° and maximum ankle flexion by 13°, whereas the other three skiers changed only marginally. The results confirm that 2D video merged with IMU data are suitable for jump analyses in winter sports, and that the modified boot will allow for alterations in landing technique provided that enough time for training is given. MDPI 2020-07-07 /pmc/articles/PMC7374433/ /pubmed/32646033 http://dx.doi.org/10.3390/s20133805 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Letter
Kurpiers, Nicolas
Petrone, Nicola
Supej, Matej
Wisser, Anna
Hansen, Jakob
Kersting, Uwe G.
Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study
title Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study
title_full Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study
title_fullStr Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study
title_full_unstemmed Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study
title_short Application of Inertial Motion Unit-Based Kinematics to Assess the Effect of Boot Modifications on Ski Jump Landings—A Methodological Study
title_sort application of inertial motion unit-based kinematics to assess the effect of boot modifications on ski jump landings—a methodological study
topic Letter
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7374433/
https://www.ncbi.nlm.nih.gov/pubmed/32646033
http://dx.doi.org/10.3390/s20133805
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