Suggestion of advanced start skill in competitive swimming

本研究旨在对竞技游泳运动员的先进起跑技术提出建议。从运动学和动力学的角度分析，认为在有背板的起跑平台上的姿势比在平台上的姿势更前倾。由于后挡板条件下后腿的水平推力较大，表明后挡板适合于水平加速度。进入后的方向转换的时间常数（TC）约为0.3秒。TC与水平速度下降量呈正相关。因此，建议采用大水平速度、浅直巷道控制速度损失。

The purpose of this investigation was suggestion of advanced start skill in competitive swimming. It was proposed that the posture on the starting platform with the back plate was more inclining forward than that on the flat platform as results of kinematically and kinetically examining. Because horizontal thrust of a rear leg was large in the backing plate condition、 it was shown that the back plate was suitable for horizontal acceleration. The time constant (TC) of the direction conversion after the entry was about 0.3 seconds. It was positive relation between TC and an amount of the horizontal speed decrease. Therefore、 it was proposed that large horizontal speed and shallow and straight entry control the velocity loss.