アルペンスキー技術のタイム短縮のための一考察
1997 年 10 巻 1 号 p. 83-89
詳細
1997 年 10 巻 1 号 p. 83-89
The purpose of this study was to investigate the effect of Alpine ski technique on racing time. Skiing technique that reduces edging periods with knees and body tended to fall line in the latter half phase of curving was is called “Speedy Curving Method" here. The subjects in this study were five female skiers who were the prize winners in Japan Intercollege Championship. Skiing styles were divided into two groups, normal style (A trial) and Speedy Curving Method (B trial). These trials were performed on a steep, a middle, and a gentle angle slopes. Movements of A and B trials were recorded between 4th and 5th pole by ineans of high speed 8 mm video camera and analized by video motion analyzer. The ski racing time was measured by using photoelectric tube system. Analysis of movement trials were executed by video motion analyzer. It's analyzed of motion when performance time of B trial was shorter than of A trial.
The results were summarized as followed:
1 ) As to the gentle and the middle angle slope, total time and lap time of 4th to 5 th pole in B trial were shorter than A trial.
2) As to loading motion in steep angle slope, the angle of trochanter major in the B trial was smaller than in A trial
3 ) As to step motion in the steep angle slope, the angle of trochanter major of left leg in B trial was smaller than in A trial. In the middle angle slope, the angle of trochanter major of right leg in B trial was larger. than in A trial.
4 ) With respect to premotion in the steep angle slope, the angle of trochanter major in B trial was smaller than in A trial.
Those results suggested that skiing training by using “speedy curving method" may be effective to reduce in Alpine ski race time.
