Using the Power Balance Model to Simulate Cross-Country Skiing on Varying Terrain

Author
Moxnes, John Fredrik
Sandbakk, Øyvind
Hausken, Kjell
Date Issued
2014
Keywords
TermsetEmneord::Hastighet
TermsetEmneord::Snø
Permalink
http://publications.ffi.no/handle/123456789/9
DOI
10.2147/OAJSM.S53503
Collection
Articles
Description
Moxnes, John Fredrik; Sandbakk, Øyvind; Hausken, Kjell. Using the Power Balance Model to Simulate Cross-Country Skiing on Varying Terrain. Open Access Journal of Sports Medicine 2014 ;Volum 5. s. 89-98
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Abstract
The current study adapts the power balance model to simulate cross-country skiing on varying terrain. We assumed that the skier’s locomotive power at a self-chosen pace is a function of speed, which is impacted by friction, incline, air drag, and mass. An elite male skier’s position along the track during ski skating was simulated and compared with his experimental data. As input values in the model, air drag and friction were estimated from the literature based on the skier's mass, snow conditions, and speed. We regard the fit as good, since the difference in racing time between simulations and measurements was 2 seconds of the 815 seconds racing time, with acceptable fit both in uphill and downhill terrain. Using this model, we estimated the influence of changes in various factors such as air drag, friction, and body mass on performance. In conclusion, the power balance model with locomotive power as a function of speed was found to be a valid tool for analyzing performance in cross-country skiing.
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