ヤマモト　ケイゾウ   Keizo Yamamoto
  山本　敬三
   所属   生涯スポーツ学部 スポーツ教育学科
   職種   教授
言語種別 英語
発行・発表の年月 2015/10
形態種別 学術論文
査読 査読あり
標題 Relationship of Asymmetry between In-run Posture and Takeoff Motion in Ski Jumping
執筆形態 単著
掲載誌名 Bulletin of the Northern Regions Lifelong Sports Research Center Hokusho University
掲載区分国内
出版社・発行元 Hokusho University
巻・号・頁 6,pp.1-6
概要 The purpose of this study was to evaluate the relations of bilateral asymmetry between the in-run posture and the takeoff motion in ski jumping. Nine male and six female subjects performed three simulated takeoff motions with their training shoes on a flat floor. We measured the in-shoe forces at the soles of both feet during the in-run posture and the takeoff motion, using the insole-shape sensors for plantar pressure distribution. By calculating the imbalanced load at the in-run posture and the force-time integral during the takeoff motion, we ascertained the symmetry index (SI) in both phases. The mean values of three trials of each subject were determined as measurements. Correlation between two SIs in in-run and takeoff was determined by analysis of correlation, which yielded a positive correlation (r = .63, P < .05). Results showed that the imbalanced load during the in-run phase somewhat influenced the bilateral imbalance of takeoff forces during the takeoff motion.