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首页> 外文会议>Asia-Pacific Congress on Sports Technology >Characteristics of the long jump take-off as the novice increases the number of steps in the approach run
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Characteristics of the long jump take-off as the novice increases the number of steps in the approach run

机译：当新手增加了方法运行时，长跳跃起飞的特征

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This study clarified factors affecting the increase in jump distance when the novice increased the number of steps in their approach run in the long jump, and discusses a training task designed to improve performance in the long jump. Twenty-eight male students who were novices in long jump and did not take part in any sport activity regularly participated in the study. They performed the long jump with run-ups of six and twelve strides. The take-off motions of the participants were captured with a high-speed digital camera (120 fps) for two-dimensional motion analysis. When students increased the number of steps in their approach run, the jump distance and approach velocity increased, horizontal deceleration during the take-off phase remained almost unchanged, and the vertical velocity at take-off and the contact time decreased. The change rate of the jump distance between six and twelve steps for the approach run had positive correlation with the change rates of the approach velocity and vertical velocity and negative correlation with the change rate of the contact time. In a previous study using athletes as participants, all athletes increased their jump distance as they increased the number of steps in their approach run. In the present study, however, many students did not increase their jump distance, and the change rate of the jump distance had a wide distribution. Therefore, we divided the students into groups according to whether the participant's change rate of the jump distance was lower or higher than the average change rate for all participants. Although both groups had increased horizontal velocity at touchdown for the lengthened run-up, participants in the low group did not increase their jump distance and their vertical velocity at take-off decreased. Additionally, in comparison with athletes, students had lower vertical velocity at take-off and horizontal deceleration during take-off. A novice should thus learn the proper technique of take-off to generate vertical velocity through horizontal deceleration.
机译：这项研究澄清了影响跳跃距离增加的因素，当新手增加了他们的方法在长跳跃中运行的步骤数量，并讨论了旨在提高长跳跃性能的训练任务。二十八名男性学生长期跳跃，并没有参加任何体育活动，经常参加该研究。他们的跳跃跳跃了六到十二步。参与者的起飞动作被高速数码相机（120 FPS）捕获，用于二维运动分析。当学生在其接近运行中增加步骤的数量时，跳跃距离和接近速度增加，起飞阶段期间的水平减速几乎保持不变，并且起飞时的垂直速度和接触时间减小。接近运行的六个步骤与12个步骤之间的跳跃距离的变化率与接触时间的变化率的接近速度和垂直速度的变化率和负相关性具有正相关性。在以前的一项研究中使用运动员作为参与者，所有运动员都会增加他们的跳跃距离，因为它们增加了他们的方法运行的步骤数量。然而，在本研究中，许多学生没有增加他们的跳跃距离，跳跃距离的变化率具有广泛的分布。因此，我们根据参与者的跳跃距离是否较低或高于所有参与者的平均变化率，将学生分成群体。虽然两个组在达达下降的水平速度下增加了延长的速度，但低组的参与者没有增加他们的跳跃距离，并且在起飞时的垂直速度下降。此外，与运动员相比，学生在起飞期间的起飞和水平减速时具有较低的垂直速度。因此，新手应该学习通过水平减速来产生垂直速度的正确技术。

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