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Please use this identifier to cite or link to this item: http://ir.jwcpe.ac.jp/dspace/handle/123456789/650

Title: スピードスケートのスタート動作における支持脚のキネティクス的特徴
Other Titles: Kinetic characteristics of the support leg during the start in speed skating
Authors: 湯田, 淳
小池, 関也
横澤, 俊治
皆川, 唯
Yuda, Jun
Koike, Sekiya
Yokozawa, Toshiharu
Minakawa, Yui
ユダ, ジュン
コイケ, セイヤ
ヨコザワ, トシハル
ミナカワ, ユイ
Keywords: start in speed skating
blade reaction force
three-dimensional motion analysis
joint torque
Issue Date: Mar-2013
Abstract: We investigated the kinetic characteristics of the support leg during the start in speed skating. A well-trained male speed skater was videotaped using four synchronized high-speed video cameras(300 fps)in the initial portion of a straight track, and the kinetic characteristics of the support leg were investigated using the panning direct linear transformation technique. The blade reaction forces (BRFs)and three-dimensional coordinates of the segment endpoints and the blades were determined to calculate the kinetic parameters of the support leg during the start movement by an inverse dynamics. The BRFs were determined using instrumented sensor klapskates(500 Hz)equipped with strain gauges. In this study, the third step(left support leg), which was taken at approximately 5 m from the start line, was analyzed. The peak value of the vertical BRF during the start movement(2.93 N/bw)in speed skating was greater than those in straight and curve skating. This indicates that the external load at the lower limb during the start in speed skating is extremely large. Moreover, the knee joint exerted a large extension power during the second half of the stroke(this peak value was approximately 12 times that in straight skating and 4 times that in curve skating). Thus, great exertion of the knee extension torque would be a characteristic of the start in speed skating.
URI: http://ir.jwcpe.ac.jp/dspace/handle/123456789/650
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