The purpose of this study was to clarify the superior skiing technique characteristics shown by Japanese skiers, including major ski demonstrators, expert skiers and advanced skiers.
Twelve skiers performed a long turn on 2 courses with different curvatures and were filmed with 3 cameras (60Hz): 2 panned and 1 panned and tilted. To obtain the 3-dimensional space coordinates, a panning DLT method was adopted. The movements of the skiers and their skis were then examined by 3D analysis. Comparison among the t3 groups – major ski demonstrators, expert skiers and intermediate skiers – suggested that the characteristics of superior skiing techniques were as follows:
① At the beginning of the turn phase, abduction and internal rotation of the outside hip increase the ski edging angles and attack angles. This is the angle between the vector of the ski and the skier’s velocity．
② This creates resistance force from the surface of the snow, enabling the skier to obtain centripetal force and then turn acutely at the beginning of the turn phase.
③ Because of this, the skier can turn smoothly, involving low deceleration at the ending of the turn phase and the edge changing phase.