CAJ | 학술논문

以我国女子铁饼运动员李艳凤和宋爱民为研究对象,通过生物力学测试对她们的运动技术特征进行分析,结果发现,李艳凤和宋爱民掷铁饼具有动作幅度大、时间短、出手角度小、完成动作快,技术稳定的特点;李艳凤起转速度低、肩髋扭转小、上肢伸展大、单支撑旋转铁饼加速快,腾空用力早,转换着地重心高,最后用力旋转幅度大、两脚距离长、出手速度快。宋爱民起转躯干扭转大、上肢伸展小,单支撑旋转时间长,腾空和转换阶段速度损失大、身体重心低,最后用力蹬伸幅度大、出手速度低。建议二人增大出手角度;李艳凤减小预摆幅度;宋爱民减小腾空和转换阶段的速度损失,增大摆动半径,加大最后用力两脚距离。
이아국녀자철병운동원리염봉화송애민위연구대상,통과생물역학측시대저문적운동기술특정진행분석,결과발현,리염봉화송애민척철병구유동작폭도대、시간단、출수각도소、완성동작쾌,기술은정적특점;리염봉기전속도저、견관뉴전소、상지신전대、단지탱선전철병가속쾌,등공용력조,전환착지중심고,최후용력선전폭도대、량각거리장、출수속도쾌。송애민기전구간뉴전대、상지신전소,단지탱선전시간장,등공화전환계단속도손실대、신체중심저,최후용력등신폭도대、출수속도저。건의이인증대출수각도;리염봉감소예파폭도;송애민감소등공화전환계단적속도손실,증대파동반경,가대최후용력량각거리。
Taking the woman discus throwing athletes of LI Yan-feng and SONG Ai-min as research object,and using the method of biomechanical testing and mathematical statistics,this paper makes study on their technique.The main conclusion as follows：their rotate movement range is large and fast,time is short,release angle is small and technique is stability.LI Yan-feng start velocity is low,shoulder and hop angle is small,arm extension range is large,accelerated higher in single support stage,strengthen early in flying stage,body centre of gravity is high in transitions,foot width is large and release velocity is high.SONG Ai-min rotate movement range is small,single support time is long,velocity lose is big during transition stage,body centre of gravity is low,foot width is small,extension range is large and release velocity is low.It suggests that shorten rotation swing enforces the technique stability on double support about LI Yan-feng,SONG Ai-min should decrease speed lose during transition stage and enlarge swing and foot width in final stage.