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Published on: September 17, 2013
Kinematic structure at the early flight position in ski jumping.
Janez Vodičar1, Milan Coh, Bojan Jošt
1University of Ljubljana, Faculty of Sport, Slovenia.
Journal of Human Kinetics
|March 15, 2013
Summary
Ski jumping success in flight phase depends on specific kinematic variables. Height of flying and body-to-horizontal angle are key for maximizing jump length in elite athletes.
Area of Science:
- Sports Science
- Biomechanics
- Kinesiology
Background:
- Ski jumping performance is influenced by complex biomechanical factors during the flight phase.
- Understanding the relationship between kinematic variables and jump distance is crucial for optimizing technique.
Purpose of the Study:
- To determine the correlation variability between ski jump length and selected kinematic variables in the early flight phase.
- To identify key kinematic parameters that significantly influence jump distance in elite ski jumpers.
Main Methods:
- Analysis of kinematic data from 29 elite Slovenian ski jumpers.
- Utilizing multi-item kinematic variables (n=9) measured during the early flight phase on an HS95m hill.
- Statistical analysis to establish correlations and explained total variance (TV) for each variable.
Main Results:
- Height of flying showed the highest significant correlation (p=0.01) with jump length, explaining 69.13% of total variance.
- The angle between the body chord and the horizontal axis was a significant aerodynamic factor (p<0.05), with high stability (TV=65.04%).
- Similar high stability (TV=61.88%) was observed for the angle between the left leg and the horizontal axis.
Conclusions:
- Kinematic parameters like flight height and specific body/leg angles are critical for maximizing ski jump distance.
- Not all kinematic variables significantly correlate with jump length; focusing on key parameters enhances performance.
- The study highlights the importance of aerodynamic and postural variables in the early flight phase for elite ski jumping success.
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