トランポリン競技における予備ジャンプと競技成績との関連

概要

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From our experiences, a trampoline competitor who does so many preliminary jumps (calld straight jumps) before performance tends not to be able to continue through ten items and stops his performance. Even if he does not stop, he tends to score poorly. The purpose of this study was to investigate whether above mentioned phenomenon was statistically correct or not. We analyzed the videotapes recorded at the trampoline competitions. The analysis was made on a total of 585 participants of individual competition in trampoline, either doing free performance at preliminary round or final performance (East Japan Inter College 1991-1993 / All Japan Inter College 1991,1992). The results showed that among top competitors at national level, those who jumped 12 times or more before performances stop significantly more than those who jumped less than 12 times (male ; odds ratio=3.25,95% confidence interval=1.00-10.88, female ; odds ratio=4.44,95% confidence interval=1.06-23.81). However, for male competitors at beginner's level, those who jumped 5 times or less before the performances stop significantly more than those who jumped more than 5 times (odds ratio=4.33,95% confidence interval=1.20-15.68). In addition, relationship between the number of straight jumps and performance scores was not significant.