Time Analysis in Men’s Slalom of Alpine Skiing

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Other Title
  • アルペンスキー男子回転競技におけるタイム分析
  • アルペンスキー男子回転競技におけるタイム分析 : 2016年ワールドカップ湯沢苗場大会を対象として
  • アルペンスキー ダンシ カイテン キョウギ ニ オケル タイム ブンセキ : 2016ネン ワールドカップ ユザワ ナエジョウ タイカイ オ タイショウ ト シテ
  • –Investigation of the FIS World Cup Yuzawa, Naeba, 2016–
  • ―2016年ワールドカップ湯沢苗場大会を対象として―

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To combine a time analysis of alpine skiing with own turn characteristics of skier plays an important role to decide where skier should attack or not. This study aimed to analyze the correlation coefficients between total time and all interval times determined by each gate, as well as those between total time and all section times including some intervals, and to clarify the merit of interval analysis method and the characteristics of the world top level’s skier. All participants in the first run of the World Cup Slalom were recorded using seven high-speed cameras with a sampling rate of 240 fps, and 29 skiers from the top 30 were analyzed. The interval time was calculated by using the number of frames between each gate, then, divided by the sampling rate. The course was divided into six sections based on the terrain. By using the interval time, the interval time ranking, the instant position of each interval and run time at the end of each section were calculated additionally. For all correlation analyses, the Pearson’s correlation coefficient (r) was calculated. Furthermore, all subjects were divided into three (High, Middle, Low) groups. The interval time ranking and the run time at the end of each section among three groups were compared by using ANOVA. All statistically significant was set at p < 0.05. Hence, there were strong correlations between the total time and all section times. The correlation results indicated that 50 interval times were significantly correlated to the total time (r ≧ 0.369; p < 0.05) as well as to the previous interval time (r ≧ 0.384; p < 0.05). Therefore, it can be concluded that the skiers in the shorter total time were faster in most sections and more than 70 % of intervals, especially, open gate setting.

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