CAJ | 학술논문

运用三维摄像测量法对运动员进行三维运动学分析,结果表明：8名运动员在开始阶段,人体重心与铁饼质心的轨迹以两种不同风格的＂倒7＂类型进入腾空阶段;人体重心与铁饼质心的位移说明了器械转动半径的大小,右脚离地时最小,进入腾空时达到最大,冠军李艳凤这一指标突出;两心的速度变化规律是开始一起加速,腾空时前者达到峰值,到最后用力时前者的急骤下降造成了后者的陡然上升;掌握好上肢发力时机至关重要,在一定范围内,最后出手时的肩臂拉引角越大,投掷成绩越好;最后用力阶段运动员不同程度的未能做出有效的左侧支撑用力动作。
운용삼유섭상측량법대운동원진행삼유운동학분석,결과표명：8명운동원재개시계단,인체중심여철병질심적궤적이량충불동풍격적＂도7＂류형진입등공계단;인체중심여철병질심적위이설명료기계전동반경적대소,우각리지시최소,진입등공시체도최대,관군리염봉저일지표돌출;량심적속도변화규률시개시일기가속,등공시전자체도봉치,도최후용력시전자적급취하강조성료후자적두연상승;장악호상지발력시궤지관중요,재일정범위내,최후출수시적견비랍인각월대,투척성적월호;최후용력계단운동원불동정도적미능주출유효적좌측지탱용력동작。
The paper carried out three-dimensional kinematic analysis of athletes by using 3D camera measurement method.The results show that： in the beginning phase,the trace of the eight athletes＇ body center of gravity and discus center of mass formed two different styles,entered the flight phase with the styles of ＂down7＂.The displacement of body center of gravity and the center of discus illustrates the turning radius of device,the minimum appears when the right foot leaves off the ground and reaches maximum while enters the flight phase.The champion LI Yanfeng outstands in this index.The variation discipline of two centers is accelerating together,the former achieves the peak at the flight phase,the abrupt decline of the former caused the latter＇s sharp rise at the final force.It is critical to master the contracting time,within a certain range,the larger of shoulder-arm drawing angle the better of the performance.During the final forcing stage,the athletes failed to make effective left-side bracing action to different degrees.