Application of inertial motion unit-based kinematics to assess the effect of boot modifications on ski jump landings : a methodological study

Kurpiers, Nicolas (author), Petrone, Nicola (author), Supej, Matej (author), Wisser, Anna (author), Hansen, Jakob (author), Kersting, Uwe (author)

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.

• Language: English
• Keywords: skiing, kinematics, motion analysis, footwear, measurement systems, ski jump, landing
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FŠ - Faculty of Sport
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 9 str.
• Numbering: Vol. 20, iss. 13, art. 3805
• PID: 20.500.12556/RUL-133822
• UDC: 796.925
• ISSN on article: 1424-8220
• DOI: 10.3390/s20133805
• COBISS.SI-ID: 22045187
• Publication date in RUL: 16.12.2021

Record is a part of a journal

• Title: Sensors
• Shortened title: Sensors
• Publisher: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 07.07.2020

Secondary language

• Language: Slovenian
• Keywords: smučanje, kinematika, analiza gibanja, smučarski čevlji, meritve, smučarski skoki, doskok