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Impact of lowering ski binding settings on the outcome of the self-release test of ski bindings among female recreational skiers

Authors Posch M, Burtscher M, Schranz A, Tecklenburg K, Helle K, Ruedl G

Received 8 September 2017

Accepted for publication 2 November 2017

Published 14 December 2017 Volume 2017:8 Pages 267—272

DOI https://doi.org/10.2147/OAJSM.S151229

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Amy Norman

Peer reviewer comments 3

Editor who approved publication: Prof. Dr. Andreas Imhoff


Markus Posch,1 Martin Burtscher,1 Alois Schranz,2 Katja Tecklenburg,2 Kenneth Helle,2 Gerhard Ruedl1

1Department of Sport Science, University of Innsbruck, Innsbruck, Austria; 2Medalp Sportclinic, Imst, Austria

Background and purpose: The ability to successfully self-release the ski binding can prevent skiing-related injuries of the lower extremities. Failure of binding release associated with a knee injury is significantly higher among females compared to males. The International Standards Organization ISO 11088 standard for binding setting values allows a lowering by 15% upon request of the skier. Thus, the aim of this study was to evaluate the impact of lowered ski binding settings by 15% on the outcome of the self-release test among female recreational skiers.
Materials and methods: In this randomized single-blinded study, a cohort of 20 females (24.5±2.7 years) performed the self-release test in the laboratory thrice with each leg under two conditions: 1) with an actual ISO 11088 setting and 2) with a setting lowered by 15%. For each attempt, torques calculated via the force plate were normalized to torques measured by a binding adjustment system (relative release torque, RRT).
Results:
Among 240 trials in total, more females were significantly able to self-release their ski bindings with lowered binding settings when compared to their actual ISO settings (53% vs 9%, p<0.001). Thirteen females (65%) were able to release their bindings at least once with both legs with lowered binding settings compared to only three females (15%) with their actual binding settings (p<0.001). Mean RRT of all failure of binding release trials significantly differed between lowered and actual binding settings (58.6%±22.2% vs 50.5%±20.4%, p=0.003).
Conclusion:
Four times more females were able to self-release their ski bindings at least once with both legs with a 15% lowered binding setting compared to their normal ISO 11088 setting. The fact that the ISO standard accepts a lowering by 15% upon request of the skier could represent an important measure to prevent knee injuries, especially for female recreational skiers.

Keywords:
recreational skiing, prevention, knee injury, self-release test, lowered ski binding settings
 

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