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通过文献资料法、专家访谈法、观察法、影像分析法、运动学分析法,选择恰当的运动学指标,对国内3支优秀技巧啦啦操队“直体后空翻一周转体720°”上抛及腾空的完成情况进行了较全面的定量描述,研究表明:(1)在上抛阶段,各队用时存在差异,其垂直速度及重心上升位移大小不同,导致上抛完成质量的差异,也影响后续腾空动作的完成效果.(2)在腾空至最高点,腾空的时间和空间也相对存在不同,而尖子在整个翻转过程中总用时相近,所以导致各队的转体速度与节奏不一,由此提出训练学观点:一是应加强底座的力量素质训练.底座在上抛阶段时屈膝缓冲和抬肩伸肘应更加充分,用力方向的准确性以及队员之间配合的一致性应有所提高.二是尖子不要急于抬头翻转,应在脱手前积极伸膝、伸髋,梗头、引臂,在缓冲阶段时,底座应主动借助内力,有控制地进行缓冲,避免过度屈膝,应加大腾起角,在脱手后开始转体.尖子在腾空过程中还应注意姿态的控制.
Through literature review, expert interviews, observation, image analysis and kinematic analysis, the author chooses the appropriate kinematic indexes and analyzes the three excellent domestic cheerleading squad The conclusion is as follows: (1) In the stage of throwing, there are differences among the teams in use, and the vertical velocity and the center of gravity rise in different sizes, resulting in the difference in finish quality , But also affect the completion effect of the subsequent vacating action. (2) In the time of vacating to the highest point, the time and space vacated are relatively different, and the total time of the top turn is similar throughout the turnover process, Different from the training point of view: First, the strength of the base should be strengthened quality training base on the stage when the knee flexion and knee extension elbow should be more fully, the direction of force accuracy and the consistency between the team members Should be improved .Second is the top son do not rush to turn upside down, positive knee extension should be in the hands before, hips, stems, arms, in the buffer stage, the base should take the initiative with the help of internal forces, buffered to avoid excessive Knee, should increase flight angle, began to twist after sell. It should also be noted that control the attitude of the elite in the vacated process.