共查询到19条相似文献，搜索用时 578 毫秒
1.
周全富 《西安体育学院学报》1999,(4)
决定标枪运动成绩最主要的因素是标枪的出手速度 ,出手速度与运动员最后用力过程中发挥的动作速度密切相关。影响动作速度的因素有体质和技术两方面 ,重视动作速度的训练和选材对提高标枪运动成绩有着十分重要的意义 相似文献
2.
标枪是投掷项目中最轻的器械,投出的远度是由器械出手的初速度、出手的角度和空气阻力三个因素决定的。就枝术原理而言,器械出手的初速度是决定运动成绩的主要因素。而器械出手的初速度又取决于投、搓力量的大小和整体动作速度。在诸多因素中,速度力量起主导作用,具备了力量素质 相似文献
3.
标枪是田赛投掷中器械最轻、技术性要求非常高的项目。标枪的出手速度是决定运动成绩的主要因素之一，而器械出手初速度又取决于投、搓力量的大小和整体动作速度。在爆发力的因素中，力量起主导作用，标枪运动员的训练需要以身体素质全面发展为基础，仅依靠技术是不够的。没有很好的身体素质，特别是力量素质很难获得最大的出手速度。正确认识力量训练的内涵和分类，对力量训练手段的选择和科学地进行力量训练以及保证训练的顺利进行，有着重要的意义。 相似文献
4.
优秀男子标枪运动员最后出手特征分析 总被引：3，自引：0，他引：3
对世界优秀标枪运动员的专项成绩与出手速度、出手角度等因素进行灰色关联分析,揭示了男子优秀标枪运动员最后出手技术的主要特征,为标枪运动训练提供参考。 相似文献
5.
1 前言 以往的文献资料表明,在指导标枪的运动中,均认为投掷标枪应“沿纵轴用力”,许多专家认为,就投掷标枪成绩而言,这不仅取决于器械出手的速度、出手高度、出手角度、左脚到起掷孤的距离等自然条件。通常认为,出手初速度对投掷成绩的影响较大, 相似文献
6.
标枪运动员投掷标枪的最佳出手点控制的正确与否,不仅影响着技术动作的正常发挥,而且也直接影响到投掷运动的成绩。通过对部分标枪运动员投掷标枪的最佳出手点的三维运动监测,确立了标枪运动员投掷标枪的正确出手点,为标枪运动的教学与训练提供初步的理论依据。 相似文献
7.
任东升 《西安体育学院学报》1984,(2)
<正> 标枪的投掷距离,在任何情况下都取决于出手的初速度和投掷的角度;同时还直接受到空气动力学和标枪本身力学特征的影响。本文旨在对标枪投掷中的力学原理作一粗浅探讨,不妥之处请指正。一、标枪出手的初速度据斜抛运动公式,斜抛物体的距离和初速度的平方成正比。所以,提高标枪的出手速度是每一个运动员的首要任务,也是标枪运动员选材的一个重要内容。如沃尔夫曼十三岁时,能把200克重的橡皮球掷到118米;金努宁十五岁投掷小石块的成绩是130米;申毛毛的掷棒球成绩也在130米以上。标枪成绩在90米以上的运动员,出手速度每秒可 相似文献
8.
投掷标枪动作速度是决定专项成绩好坏的重要因素,通过对优秀标枪运动员林东投掷动作速度的训练探讨,寻求并制定符合他个性特点的动作速度训练及方法手段,以求训练动作更具针对性。 相似文献
9.
10.
掷标枪是田径运动中技术比较复杂的项目之一,出手速度是影响其成绩的重要因素之一,以右手持枪为例来分析如何提高标枪的出手速度。 相似文献
11.
我国优秀女子标枪运动员投掷步技术的运动学研究 总被引：3，自引：1，他引：2
对十运会田径比赛女子掷标枪决赛前8名运动员的投掷步技术进行解析研究。结果表明,我国优秀女子标枪运动员助跑速度快,但速度利用率却不高;投掷步时短,步频快,不能为最后的用力做好充分的准备;投掷各步躯干后倾角变化小,对标枪施力不够;左脚落地时膝角缓冲过大,制动效果差。同时,投掷成绩与最后交叉步后身体重心水平速度在一定程度上呈正相关。 相似文献
12.
随着运动训练的科学化、专门化及针对性的日益加强，我们认为掷标枪的技术与能力的结合是否完美，则集中体现在投掷的动作速度上。本文将围绕最后用力阶段的投掷动作速度问题，从决定动作速度的几个因素出发进行分析论证，并提出对标枪运动员的训练特点。 相似文献
13.
采用文献资料法收集有关统计数据，运用运动生物力学、空气动力学原理，对标枪出手瞬间态势进行了定量和定性分析，系统地阐述了诸多力学因子对成绩的影响以及它们之间的相互关系，对运动训练实践起到指导作用。笔者试通过文献资料法结合统计学、生物力学和空气动力学等知识对标枪出手瞬间态势的力学因子进行较系统全面的综合分析。以进一步提高人们对标枪项目的认识，以更好地指导运动训练的实践。 相似文献
14.
标枪运动员专项速度训练模式研究 总被引：2，自引：0，他引：2
陈国平 《西安体育学院学报》2008,25(5)
从专项速度入手，对标枪运动员专项速度训练模式进行研究，其目的在于通过对标枪运动员专项速度的研究，进一步明确专项速度在标枪运动中的重要作用，设计适合标枪运动员的专项速度训练模式，为标枪运动的快速发展提供可参考和借鉴的理论依据。 相似文献
15.
Thomas Reilly 《Journal of sports sciences》2013,31(1):1-2
In this paper, the scientific literature and that on the sports sciences relevant to javelin throwing is critically reviewed. This is particularly timely because of the change in the specification of the javelin for the men's event, which was introduced by the IAAF in 1986. A full discussion of the aerodynamics of the javelin is presented with due consideration of the change in pitching moment characteristics that the rules change had brought about. The uses and limitations of current computer programs for simulating javelin flight, in order to estimate optimal release parameters, are profiled. Consideration is also given to the effects of wind velocity, air density, javelin weight and the flutter and spin of the javelin on its flight. The review further considers the optimization of release parameters, drawing upon computer simulations and field‐based data. The effects of release speed, release height, release angle, release angle of attack and release pitch rate are assessed. The javelin throwing technique is discussed in relation to cinematographically derived data, including an evaluation of experimental procedures. The importance to successful performance of the grip, the run‐up and transition phases, the cross over and delivery strides are each reviewed. Finally, some prognoses as to the direction of future research into this complex throwing skill are offered. 相似文献
16.
王际燕 《体育科技文献通报》2008,16(4):32-33
通过查阅有关文献资料，结合有关理论知识对决定标枪出手速度的相关因素进行研究，使运动员和教练员可以全面、准确的了解各因素对出手速度的影响以及它们之间的相互关系，从而对运动训练起到指导作用。 相似文献
17.
This paper examines the exploitation of inertial measurements to analyze javelin throwing mechanics. The main objective was to demonstrate that consumer-grade inertial navigation systems, augmented with some position and attitude data obtained from a video sequence, yield detailed information of the mechanics of javelin throwing. Especially, such a system makes it possible to analyze the momentary force and power exerted on the javelin during the acceleration phase. Although the presented system is a pilot, leaving space for further improvements, it already reveals the potential of inertial navigation systems to sports. In practise, an inertial measurement unit was embedded inside the tip of the javelin to determine the javelin’s momentary attitude, position, and velocity. Graphs on the speed and angular velocity about the longitudinal axis of the javelin during the whole performance are presented. The maximum estimated release speed and release angular speed were 28.02 m/s and 215.9 rad/s, respectively. The acceleration phase trajectory of the javelin and its deviation from a straight line path are demonstrated. Additionally, the momentary forces and powers are shown and the effect of aerodynamic forces on the projectile is specified. The magnitude of the maximum tangential forces and accelerating powers were 364 N and 9.76 kW. The duration and length of the acceleration phase trajectory varied between 223 and 231 ms, and 2.48 and 2.75 m. To estimate the accuracy of the inertial measurements, the acceleration phase results were compared to measurements made with high-speed cameras. 相似文献
18.
个体的行为受心理活动的制约。心理结构发生变化，就必然会引起个体的行为方式及结果发生变化。研究将理论应用于投掷技术教学实践，在教学中使学生形成一定的心理定向，把学习动作技能与大脑皮层运动中枢对动作的指挥要求结合起来。结果表明：在教学过程中建立速度定向，有利于学生连贯流畅地完成技术动作，增加速度利用率，从而提高教学效果。 相似文献
19.
In this paper, the scientific literature and that on the sports sciences relevant to javelin throwing is critically reviewed. This is particularly timely because of the change in the specification of the javelin for the men's event, which was introduced by the IAAF in 1986. A full discussion of the aerodynamics of the javelin is presented with due consideration of the change in pitching moment characteristics that the rules change had brought about. The uses and limitations of current computer programs for simulating javelin flight, in order to estimate optimal release parameters, are profiled. Consideration is also given to the effects of wind velocity, air density, javelin weight and the flutter and spin of the javelin on its flight. The review further considers the optimization of release parameters, drawing upon computer simulations and field-based data. The effects of release speed, release height, release angle, release angle of attack and release pitch rate are assessed. The javelin throwing technique is discussed in relation to cinematographically derived data, including an evaluation of experimental procedures. The importance to successful performance of the grip, the run-up and transition phases, the cross over and delivery strides are each reviewed. Finally, some prognoses as to the direction of future research into this complex throwing skill are offered. 相似文献