A framework for measuring alpine skiing technique

Area of Science:

• Biomechanics
• Sports Science
• Motor Control

Background:

• Alpine skiing technique analysis faces a disconnect between qualitative practitioner descriptions and quantitative scientific measures.
• Previous research often uses isolated biomechanical variables, failing to capture holistic movement patterns like forward-backward lean.

Purpose of the Study:

• To develop a framework for objective, quantitative measurement of skiing technique aligned with practitioner terminology.
• To assess the framework's sensitivity by comparing skiing techniques across different skill levels and national education systems.

Main Methods:

• Full-body kinematics of expert ski instructors were captured using inertial measurement units (IMUs).
• Principal Component Analysis (PCA) was employed to derive quantitative scales for key movement dimensions.
• Skiing performance data were projected onto principal component vectors to generate objective technique scores.

Main Results:

• The framework successfully quantified differences between basic parallel, parallel dynamic, and race carving techniques.
• Objective scores confirmed known distinctions in skiing technique across skill milestones.
• Variations in upper-body rotation strategies were identified between Austrian and German ski instructors.

Conclusions:

• The developed framework effectively bridges the gap between scientific and practical perspectives in skiing technique analysis.
• This quantitative approach offers a transferable tool for evaluating technique in skiing and potentially other sports.
• The study provides objective insights into the nuances of skiing technique and instructor differences.