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On Ski–Snow Contact Mechanics During the Double Poling Cycle in Cross-Country Skiing
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-0414-029X
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-4085-8306
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0009-0005-4747-5753
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-7029-1112
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2024 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 72, no 2, article id 44Article in journal (Refereed) Published
Abstract [en]

Of the medals awarded during the Winter Olympics Games, most are awarded for sports involving cross-country (XC) skiing. The Double Poling (DP) technique, which is one of the sub-techniques used most frequently in XC skiing, has not yet been studied using simulations of the ski–snow contact mechanics. This work introduces a novel method for analysing how changes in the distribution of pressure on the sole of the foot (Plantar Pressure Distribution or PPD) during the DP motion affect the contact between the ski and the snow. The PPD recorded as the athlete performed DP, along with an Artificial Neural Network trained to predict the geometry of the ski (ski-camber profile), were used as input data for a solver based on the boundary element method, which models the interaction between the ski and the snow. This solver provides insights into how the area of contact and the distribution of pressure on the ski-snow interface change over time. The results reveal that variations in PPD, the type of ski, and the stiffness of the snow all have a significant impact on the contact between the ski and the snow. This information can be used to improve the Double Poling technique and make better choices of skis for specific snow conditions, ultimately leading to improved performance.

Place, publisher, year, edition, pages
Springer , 2024. Vol. 72, no 2, article id 44
Keywords [en]
Contact-mechanics, Cross-country skiing, Plantar pressure, Ski-camber, Sports technology
National Category
Sport and Fitness Sciences Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements; Physiotherapy; Centre - Centre for Sports and Performance Technology (SPORTC)
Identifiers
URN: urn:nbn:se:ltu:diva-104933DOI: 10.1007/s11249-024-01839-3Scopus ID: 2-s2.0-85188590964OAI: oai:DiVA.org:ltu-104933DiVA, id: diva2:1848029
Funder
Swedish Research Council, 2019-04293
Note

Validerad;2024;Nivå 2;2024-04-02 (marisr);

Funder: Swedish Olympic Committee;

Full text license: CC BY

Available from: 2024-04-02 Created: 2024-04-02 Last updated: 2024-04-03Bibliographically approved

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Hindér, GustavKalliorinne, KalleSandberg, JoakimAlmqvist, AndreasHolmberg, Hans-ChristerLarsson, Roland

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4748495051525350 of 112
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