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Please use this identifier to cite or link to this item: http://ir.jwcpe.ac.jp/dspace/handle/123456789/614

Title: スピードスケートにおける滑走姿勢の相違が空気抵抗力に及ぼす影響
Other Titles: The influence of air resistance on different skating postures in speed skating
Authors: 湯田, 淳
青柳, 徹
高松, 潤二
山辺, 芳
鈴木, 恵一
Yuda, Jun
Aoyanagi, Toru
Takamatsu, Junji
Yamanobe, Kaoru
Suzuki, Keiichi
ユダ, ジュン
アオヤナギ, トオル
タカマツ, ジュンジ
ヤマノベ, カオル
スズキ, ケイイチ
Keywords: speed skating
air frictional force
skating posture
wind tunnel experiment
Issue Date: Mar-2009
Abstract: The purpose of this investigation was to obtain useful information for enhancing the performance of speed skaters by analyzing the influence of air resistance on different skating postures. Eight male skaters participated in a wind tunnel experiment, where air frictional forces (drag forces) under different skating postures were determined using a force platform (1 kHz). The skaters were videotaped with a digital video camera (60 fps)from a side by using a two-dimensional DLT method. The two-dimensional coordinates of the body were collected to calculate the segment angles (torso, thigh, and shank) in the sagittal plane. The torso, thigh, and shank angles in the normal skating posture were 11.0±5.2 deg, 27.5±9.4 deg, and 59.5±5.7 deg, respectively. Although the air frictional force in the normal skating posture (17.3±2.1 N) was significantly smaller than those in a high skating posture (22.8±2.3 N, p<0.001) and the highest skating posture (28.8±2.4 N, p<0.001), it was not significantly different than those in a low skating posture (15.4±0.9 N) and the lowest skating posture (14.7±1.1 N). This indicates that the air frictional force remarkably increases with the height of skating posture. Moreover, although in a low skating posture, skaters experienced great stress on their lower limbs, the decrease achieved in the air resistance by greatly decreasing the height of skating posture was remarkably small. Thus, the normal skating posture presented in this study would be rational skating posture for minimizing the air resistance and maintaining the skating movement.
URI: http://ir.jwcpe.ac.jp/dspace/handle/123456789/614
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