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Validation of 2D Force Measurement Roller Ski and Practical Application.
Shuang Zhao1, Vesa Linnamo1, Keijo Ruotsalainen1
1Faculty of Sport and Health Sciences, University of Jyväskylä, 40014 Jyväskylä, Finland.
Sensors (Basel, Switzerland)
|December 23, 2022
Summary
Newly developed two-dimensional force measurement roller skis accurately measure forces during cross-country skiing. These validated roller skis are suitable for training and research without impacting skier performance.
Area of Science:
- Biomechanics
- Sports Technology
Background:
- Measuring forces in cross-country skiing is crucial for technique analysis.
- Existing methods may not capture essential medio-lateral forces during skating techniques.
Purpose of the Study:
- To validate newly designed two-dimensional force measurement roller skis.
- To assess the system's ability to measure vertical and medio-lateral forces.
Main Methods:
- Static and dynamic loading tests were performed on the roller skis.
- Force data were resolved into a global coordinate system and compared to force plate measurements.
- Skier performance was evaluated on a treadmill using normal and force measurement roller skis.
Main Results:
- The force-time curves from the new system showed high similarity to the reference system (CMC > 0.940).
- The absolute force differences in the X and Z directions were small (3.9–33.3 N).
- The added weight of the force measurement roller skis did not impede skier performance.
Conclusions:
- The two-dimensional force measurement roller skis are valid for research and training.
- This technology can aid in the investigation of skate skiing techniques.
- The system is reliable for daily training and performance analysis.
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