多段階の泳速度におけるクロール泳中の自己推進時抵抗とストリームライン姿勢中の受動抵抗の比較 A comparison between active drag in front-crawl and passive drag on the body with a streamlined position at various velocities

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<p>The purpose of this study was to compare active drag during front-crawl swimming performed by competitive swimmers with passive drag acting on the same group of swimmers with a streamlined position at various velocities. Seven male competitive swimmers participated in this study, and the testing was conducted in a swimming flume. Active drag was evaluated for front-crawl swimming with upper and lower limb motion using a methodology that estimates the drag in swimming using measured residual thrust values (MRT method). Passive drag was measured by a load cell connected to the swimmers with a streamlined position using a stainless-steel wire. In each case, drag was estimated at six staged velocities ranging from 1.0 to 1.5 m/s. To compare the drags at various velocities, we calculated coefficients <i>a</i> and <i>b</i> by applying the measured force value at each velocity to the equation <i>D</i> = a <i>v</i><sup><i>b</i></sup> (<i>D</i>: drag, <i>v</i>: velocity). The active drag estimated from the MRT method (<i>a</i> = 35.7 ± 5.3, <i>b</i> = 2.80 ± 0.22) was larger than passive drag (<i>a</i> = 23.6 ± 3.1, <i>b</i> = 2.08 ± 0.23). Furthermore, the difference between active and passive drag was large at high velocities. Therefore, it is possible that the effects of factors other than posture and/or body shape have a large influence on active drag, especially at high velocity.</p>

収録刊行物

  • 体育学研究

    体育学研究, 2018

    一般社団法人 日本体育学会

各種コード

  • NII論文ID(NAID)
    130007396903
  • 本文言語コード
    JPN
  • ISSN
    0484-6710
  • データ提供元
    J-STAGE 
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