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三浦康二

ミウラコウジ (Koji Miura)

論文

タイトル: 競歩における高い歩行スピード獲得のためのステップ変数と歩行動作との因果構造
タイトル（英）: Causal structure of spatiotemporal variables and walking motion for achieving high walking speed in racewalking
参照URL: https://www.jstage.jst.go.jp/article/jjpehss/advpub/0/advpub_009-24014/_article/-char/ja/
著者: 佐藤高嶺, 大山卞圭悟, 三浦康二, 川向哲弥, 大久保玲美, 尾縣貢
著者（英）: Takane SATO , Keigo OHYAMA-BYUN , Koji MIURA , Tetsuya KAWAMUKAI , Remi OHKUBO , Mitsugi OGATA
担当区分
概要
概要（英）: The purpose of this study was to clarify the causal structure for achieving high walking speed and to obtain useful information that would contribute to the coaching of racewalking. Ninety-seven male race-walkers of wide range of performance level were analyzed by using motion analysis method of three-dimensional direct linear transformation with two-videocameras. The variables such as walking speed, step length, step frequency, joint angle, segment angular velocity were obtained from the video-images in early phase of 20-km racewalking competition. Several indexes were calculated from spatiotemporal variables using the height of each athlete, and we examined the relationships among these indexes. Based on its relationships, a causal structure model including walking motion variable was developed, and the validity of this model was examined using structural equation modeling (SEM). The main results were as follows. The walking speed index and step length index showed a linear relationship with their component variables, whereas the pitch index showed a curvilinear relationship with contact time index and flight time index. This indicates that the relationship between the pitch index and its component variables varies depending on the performance level. In addition, the walking speed index was moderately to strongly correlated with both the step length index and the pitch index. Furthermore, the step length index was strongly correlated with the flight distance index and the pitch index with the contact time index. These correlations indicate that improving the flight distance index and decreasing the contact time index are important for achieving high walking speed. The validity of the model developed in this study was high, indicating that the model represents the actual relationships among the indexes and walking motion. The model revealed that large angular velocity of shoulder flexion on the supporting leg side and angular velocity of swing forward the recovery thigh at ground contact and little anterior tilt of the torso at toe off would alter the subsequent motions and increase the walking speed. The model developed in this study shows the causal structure for achieving high walking speed in racewalking as a series of motions, which may provide useful information for coaching considering the entire walking motion.
出版者・発行元: 日本体育学会
出版者・発行元（英）: Japan Society of Physical Education, Health, and Sport Sciences
誌名: 体育学研究
誌名（英）: Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences)
巻
号
開始ページ
終了ページ
出版年月: 2025年1月
査読の有無: 査読有り
招待の有無
掲載種別: 研究論文（学術雑誌）
ISSN: 1881-7718
DOI URL: https://doi.org/10.5432/jjpehss.009-24014
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三浦 康二

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三浦康二