竞技健美操难度组合C289接A187的运动学分析

Kinematic analysis of competitive aerobic difficulty combination C289 followed by A187

运用QUALISYS红外光点高速运动捕捉系统,对5名男子竞技健美操世界冠军完成难度动作C289接A187的技术特征进行运动学分析,进一步明晰该难度组合的正确技术模式,为难度组合的针对性与规范性训练提供理论依据。研究表明:(1)运动员起跳属于慢速拉长收缩循环,肩髋扭转角度越大,能够存储更多的核心抗旋能量。(2)腾空过程中,运动员能够把握最佳屈体时机,前难度屈体时刻与后难度提臀屈体时刻髋关节角度均符合规则要求。(3)世界冠军身体重心Z轴方向位移呈波浪式移动,核心控制能力较强,较高的腾空高度是完成高难度动作和增加动作稳定性的前提。(4)连接阶段腾起时以肘关节伸展发力为主,A187成功率较高,手脚几乎同时落地。(5)根据难度组合的运动时间特征、重心位移特征以及各阶段的运动学参数,得出世界冠军完成C289接A187的技术量化模型。

By using the QUALISYS infrared light spot high speed movement capture system,the authors carried out kinematic analysis on the technical characteristics of difficulty movement C289 followed by A187 completed by five male competitive aerobic world champions,further clarified the correct technical mode of the difficulty combination,so as to provide a theoretical criterion for targeted and normative training.The authors revealed the following findings:1)The taking-off of the athletes belongs to SSC,the bigger the shoulder and hip twisting angle,the more core anti-rotation energy can be stored;2)In the process of soaring,the athletes could grasp the best moment for body bending,and the hip joint angles at the former difficulty body bending moment and at the latter difficulty hip lifting and body bending moment met rule requirements;3)In the axis Z direction,the displacement of the center of gravity of the world champions moved in a wavy way;their core control ability was strong;a higher soaring height is the precondition for completing highly difficult moves and increasing move stability;4)At the connecting stage,the athletes exploded their power mainly by elbow joint stretching during lifting,their A187 success rates were high;their hands and feet landed almost simultaneously;5)According to the movement time characteristics,center of gravity displacement characteristics and kinematic parameters at various stages with respect to the difficulty combination,the authors derived the technique quantified model of C289 followed by A187 completed by the world champions.