What Are Kinematic and Kinetic Differences between Short and Parallel Turn in Alpine Skiing?

Area of Science:

• Sports Biomechanics
• Alpine Skiing Pedagogy
• Motor Skill Analysis

Background:

• Alpine ski schools aim to integrate beginners using techniques like parallel turns (PT) and short turns (ST).
• Understanding the biomechanical distinctions between PT and ST is crucial for effective ski instruction.
• Objective data is needed to differentiate the complexity of these fundamental skiing maneuvers.

Purpose of the Study:

• To conduct a synchronized kinetic and kinematic analysis of parallel turns (PT) and short turns (ST).
• To identify key biomechanical differences in foot pressure and lower limb angles between PT and ST.
• To provide an objective basis for understanding the complexity of ST versus PT in alpine skiing.

Main Methods:

• Nine male ski instructors performed 90 parallel turns and 90 short turns.
• Kinetic and kinematic parameters were analyzed, focusing on foot pressure and lower limb angles.
• Paired t-tests were used to compare differences between the two turning techniques.

Main Results:

• Significant differences were found in the ratio of pressure distribution between the inside and outside foot for PT and ST.
• Distinct kinematic parameters were observed in the outside leg during parallel versus short turns.
• These biomechanical variations objectively explain the higher complexity associated with mastering short turns.

Conclusions:

• The study provides objective biomechanical insights into the differences between parallel and short turns.
• Findings can inform and refine teaching methodologies for alpine ski beginners.
• Objective evaluation of biomechanical factors confirms the greater complexity of short turns compared to parallel turns.