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本研究对四种泳势腿部动作水下摄影的连续图片进行了详细的解析,绘出了脚尖、踝关节、膝关节和髋关节的运动轨迹,以及脚、小腿和大腿各环节的运动棍图.全面地揭示了腿部动作的运动学特征,并据此对各环节的受力作了进一步的流体力学分析,揭示出各环节的动力学特征.研究结果表明:除蛙泳外的三种泳势的腿部动作,主要是横向运动,推进力的成份主要是升力;而蛙泳腿部动作是既有纵向又有横向的运动,推进力的成份既有阻力的因素又有升力的因素.
In this study, the continuous pictures of underwater photography of four kinds of swimming motion of leg movements were analyzed in detail, and the motion trajectories of toes, ankles, knees and hips and the sports sticks of the legs, lower legs and thighs were drawn The figure fully reveals the kinematic characteristics of the leg movements and further analyzes the hydrodynamic forces of the links according to the results and reveals the dynamics of each link.The results show that three Swimming leg movements, mainly horizontal movement, the main propulsion force is lift; and breaststroke leg movements are both vertical and horizontal movement, the composition of the propulsion both resistance and lift factors.