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首页> 外文期刊>Journal of Biomechanics >Influence of different approaches for calculating the athlete's mechanical energy on energetic parameters in the pole vault.
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Influence of different approaches for calculating the athlete's mechanical energy on energetic parameters in the pole vault.

机译：计算运动员机械能的不同方法对撑杆跳高能参数的影响。

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The purposes of this study were as follows: (1) To determine the differences between two- and three-dimensionally calculated energy of the athlete in the pole vault. (2) To determine the differences between CM energy and total body energy. (3) To examine the influence of these different approaches of calculating the athlete's energy on energetic parameter values during the pole vault. Kinematic data were gathered during the pole vault final of the track and field world championships in 1997. Two video cameras (50Hz) covered the last step of the approach including the pole plant and 2 cameras covered the pole phase up to bar clearance, respectively. Twenty successful jumps were analysed. The characteristics of the energy development is similar for the different approaches. Initial energy, energy at maximum pole bend and energy at pole release (primary parameters) show significant differences (p<0.05). The findings indicate that rotatory movements and movements relative to the CM have a larger influence on the primary parameters than movements apart from the main plane of movement. For analysing the energy exchange between the athlete and the elastic implement pole only the differences among the secondary parameters (initial energy minus energy at maximum pole bend, final energy minus energy at maximum pole bend) are needed (Arampatzis et al., 1997 Biomechanical Research Project at the Vth World Championships in Athletics, Athens 1997: Preliminary Report. New Studies in Athletics 13, 66-69). For those parameters the relative differences between the calculation approaches range only between 1.47 and 0.04%. This indicates that the influence of the different approaches for calculating the athlete's energy on the analysis of energy exchange is negligible.
机译：这项研究的目的如下：（1）确定在撑杆跳中运动员的二维和三维计算能量之间的差异。 （2）确定CM能量和全身能量之间的差异。 （3）研究在撑竿跳高过程中这些计算运动员能量的方法对能量参数值的影响。运动数据是在1997年田径世锦赛的撑竿跳高决赛期间收集的。两台摄像机（50Hz）覆盖了该方法的最后一步，包括撑杆工厂，两台摄像机分别覆盖了杆位直到杆间隙为止。分析了二十次成功的跳跃。对于不同的方法，能源发展的特征是相似的。初始能量，最大极点弯曲能量和极点释放能量（主要参数）显示出显着差异（p <0.05）。研究结果表明，旋转运动和相对于CM的运动对主要参数的影响要大于与运动主平面分开的运动。为了分析运动员和弹性器械杆之间的能量交换，仅需要次级参数之间的差异（初始能量减去最大杆弯曲处的能量，最终能量减去最大杆弯曲处的能量）（Arampatzis等人，1997年，生物力学研究） 1997年雅典第五届世界田径锦标赛项目：初步报告，田径新研究13，66-69）。对于这些参数，计算方法之间的相对差异仅在1.47和0.04％之间。这表明计算运动员能量的不同方法对能量交换分析的影响可以忽略不计。

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