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本文对国内外部分优秀男子标枪运动员最后出手瞬间的几个角度进行比较分析，发现我国男子标枪运动员出手参数的部分角度不合理，左膝角度相对偏小缓冲角度偏大、右膝角偏大缓冲角度过大、标枪出手角度合理但姿态角、攻角、晃动角偏大。 相似文献
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通过对我国优秀女子标枪运动员投枪出手速度的效果测度灰色关联分析，揭示其有关因素对标枪出手速度所起的作用及地位。结果表明：影响标枪出手速度的首要因素是标枪离手时的左膝角，说明左腿迅速而充分的蹬伸对出手速度起着重要的影响作用。 相似文献
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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
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为探索我国男子优秀标枪运动员的技术,采用了高速摄影机与影片分析,对李荣祥等男子优秀标枪运动员掷标枪最后用力技术过程中,身体水平速度和器械(标枪)速度进行了运动学分析。从而,揭示了我国男子优秀标枪运动员最后用力技术的特征。为便于分析,将其分为右脚触地瞬间、左脚触地瞬间、标枪出手瞬间三个时相进行研究。1.身体重心水平速度的变化交叉步右脚触落地后,由于人体的重心位于右脚支撑点后上方,地面对人体的反作用力方向与人体运 相似文献
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最后用力阶段髋的稳定性对标枪运动员出手初速度的影响 总被引：5，自引：1，他引：4
谭建共 《武汉体育学院学报》2002,36(1):88-90
通过对我国男子优秀标枪运动员最后用力阶段髋关节的运动状态进行测试与比较，发现左、右髋有其自身的运动规律，其稳定性直接影响到标枪的出手效果。 相似文献
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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
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标枪飞行轨迹的计算机仿真及实际应用 总被引：8，自引：0，他引：8
研究采用风洞实验和计算机仿真的方法，计算标枪在三维空间的飞行轨迹，对影响标枪飞行远度的各种因素，如出手速度、出手角度、初始攻角、初始俯仰角速度、初始偏航角等进行了定量分析，本文还根据标枪运动员投掷的实际情况提出了女子标枪运动员的最佳初始条件组合。 相似文献
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Javelin throwing is technically demanding. Sequences of upper and lower extremity motions are important for javelin throwing performance. The purpose of this study was to determine the general sequences of upper and lower extremity motions of elite male and female javelin throwers. Three-dimensional kinematic data were collected for 32 female and 30 male elite javelin throwers during competitions. Shoulder, elbow, wrist, hip, knee, ankle, lower trunk, and upper trunk joint and segment angles were reduced for the best trial of each participant. Beginning times of 6 upper extremity and 10 lower extremity joint and segment angular motions were identified. Sequences of the upper and lower extremity motions were determined through statistical analyses. Upper and lower extremity motions of the male and female elite javelin throwers followed specific sequences (P?≤?0.050). Upper extremity motions of the male and female elite javelin throwers did not follow a proximal-to-distal sequence as suggested in the literature. Male and female elite javelin throwers apparently employed different sequences for upper and lower extremity motions (P?相似文献
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马尚奎 《体育科技文献通报》2008,16(3):24-24,38
标枪投掷中，最后用力的好坏直接影响到运动成绩，在分析了各环节的基础上提出了最后用力在标枪投掷中的重要作用。而在最后用力技术环节中，左侧支撑技术的好坏，直接影响力的传递和用力的效果，进而影响投掷成绩。 相似文献
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浅析动作准确性对标枪成绩的影响 总被引：1，自引：0，他引：1
本文对学生动作准确性与标枪成绩之间的关系进行了分析，结果表明：投掷臂本体感觉的敏感性对标枪成绩有着重要的影响，为标枪教学中把握技术重点、分解技术难点。适应现代教学改革、促进教学质量的提高提供依据。 相似文献
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不同等级女子标枪运动员身体素质发展水平的检查与评定 总被引：2，自引：1，他引：1
通过对我国女子标枪运动员身体素质指标的测试、函调和查阅大量文献资料,获得二级、一级、健将级标枪运动员12项身体素质指标的数据,运用统计学方法分析处理,建立了3种级别运动员身体素质发展水平的回归方程,制定了身体素质发展水平的评分标准以及检测性项目综合发展水平、均衡程度、与专项成绩的适应程度的评定方法,为教练员制定计划、控制训练过程和预测运动成绩提供参考。 相似文献
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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
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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
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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
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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
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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