Evaluating wrapping alpine ski boots during on-snow carving.
Eric C Honert1, Kathryn Harrison1, Daniel Feeney1
1Performance Fit Laboratory, BOA Technology Inc., Denver, CO, United States.
Frontiers in Sports and Active Living
|July 31, 2023
Summary
The BOA ski boot closure system enhanced skier performance and comfort compared to traditional buckle closures. BOA boots improved carving scores and reduced foot pressure, suggesting better force transfer and less discomfort.
Area of Science:
- Biomechanics
- Sports Engineering
- Orthopedics
Background:
- Alpine ski boots are critical for force transfer but can cause discomfort.
- Traditional buckle closures may limit performance and comfort.
- Foot-wrapping designs in athletic footwear enhance directional stability.
Purpose of the Study:
- To systematically compare the performance and fit of BOA and buckle ski boot closure systems.
- To evaluate the impact of different closure mechanisms on ski carving and foot pressure distribution.
Main Methods:
- Two-part study with 22 subjects for on-mountain skiing and 10 for in-laboratory pressure evaluation.
- Data collection included inertial measurement units (IMUs), plantar pressures, and subjective feedback.
- Static pressure mapping of the dorsal and plantar foot surfaces during boot flexion.
Main Results:
- BOA boots demonstrated improved subjective and objective ski performance, with higher carving scores.
- No significant differences in edge angles were observed between the two boot types.
- BOA boots reduced static peak plantar pressures in the rearfoot and overall dorsal pressure.
Conclusions:
- This study provides the first systematic evaluation of ski boot closure systems.
- BOA closure's improved carving performance is linked to altered pressure distribution, potentially reducing discomfort.
- The findings suggest BOA closures facilitate effective force transfer while enhancing skier comfort.
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