engleski

SOME BIOMECHANICAL CHARACTERISTICS OF SLALOM TURN DURING RACE OF ELITE ALPINE SKIERS

The aim of this study is to determine the relationship between speed of passing through ski gates and variables of geometry of skiers’ body during slalom race for the top alpine skiers. The parameters were recorded at the World Cup Race Snow Queen Trophy on 30 top alpine skiers participating in the second run. The Ariel Performance Analysis System was used to calculate the 3D kinematic data. We determined the distance of elite skiers’ lines of skiing from the fall line and tried to establish whether the competitors with a shorter line of skiing in the gate setting achieve higher velocities and consequently better race results. The most significant correlation (r=0.95) was observed between the distance of outside ski boot and ski gate and projection of center of gravity to outside ski boot distance. Mentioned correlation is a result of skiers’ effort to find an optimal position between outside ski and projection of center of gravity relative to the ski gate. Statistically significant and positive correlation (r=0.65) observed between distance of skiers’ center of gravity and ski gate and distance between center of gravity and outside ski boot explains how greater distance of outside ski boot from ski gate required greater deflection of skiers’ body toward center of turn in order to optimize the trajectory passing through the gate. Correlation of skiers’ speed at gate and investigated variables of geometry of skiers’ body was not overall statistically significant. The absence of significance between position of center of gravity, ski boots and velocity might be explainable by undemanding configuration of ski slope at filmed slalom turn and superb technical performance of investigated alpine skiers. Use of more advanced technology might be more appropriate for the investigation of subtle differences in the race performance among top alpine skiers.

slalom discipline, kinematic indicators, center of gravity

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