Kinematical Analysis of Underwater Walking and Running
Kinematical Analysis of Underwater Walking and Running
复制标题
水下行走和跑步的运动学分析
DOI：
10.1080/10578310210396
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
K. Kitagawa
中科院分区：
文献类型：
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作者：
Takeru Kato;Shohei Onishi;K. Kitagawa
本研究的目的是确定水下运动的运动学特征，并将其与陆地运动的运动学特征进行比较。六名男性受试者分别在常规跑步机上和水下跑步机上行走和跑步。两个跑步机的速度从0.56 m s 1开始逐渐增加到3.33 m s 1，这是水下跑步机的最大速度。运动分析表明，水下运动具有以下特点：(a)在水中以较低的速度从步行（1.11 m s 1）过渡到跑步；(b)在水中步频明显较低；(c)为了减少水的水动力阻力，随着跑步机速度的增加，膝关节弯曲的幅度更大，以减少腿部封闭的轨迹面积；(d)在1.11 m / s的步行速度以上，观察到许多运动学差异，并且在此速度以上，水中的摄氧量明显更高。在水中，它们的运动策略与在陆地上大不相同。
The purpose of this study was to determine kinematical characteristics of underwater locomotion and to compare them with those of land locomotion. Six male subjects performed walking and running on both conventional and underwater treadmills. Both treadmill speeds increased incrementally starting from 0.56 m s 1 to 3.33 m s 1, the maximum speed of the underwater treadmill. The motion analysis showed that underwater locomotion is characterized by the following points: (a) A transition from walking (1.11 m s 1) to running occurs at a lower speed in water; (b) stride frequency is significantly lower in water; (c) in order to reduce the hydrodynamic resistance of water, a greater knee joint flexion is used to reduce the trajectory area enclosed by the legs as the treadmill speed is increased; and (d) many kinematical differences were observed above a walking speed of 1.11 m s 1, also above this speed oxygen uptake was significantly higher in water. In water, the strategy of locomotion is quite different from that on land.