对我国优秀女子标枪运动员投掷步阶段的重心及角度参数研究

通过查阅大量文献资料获得当前世界优秀女子标枪运动员投掷步阶段的重心及角度参数,以此为基础,采用三维摄像解析法对2012年全国长投公开赛暨奥运会选拔赛女子标枪前3名运动员投掷步阶段的身体特征进行运动学分析,并将中国运动员与世界优秀运动员的相关运动学参数进行比较研究,从中找出中国优秀运动员投掷步技术所存在的不足,为促进女子标枪运动水平的提高提供理论参考。     

对我国优秀标枪运动员投掷步技术的力学解析

通过对我国优秀标枪运动员投掷步与世界优秀选手投掷步躯干后倾角等运动生物力学参数的对比分析,发现我国标枪运动员在投掷步和最后用力技术上存在着一定的差距,这是影响运动员成绩提高与稳定的原因之一。为了提高我国标枪运动成绩,完善我国运动员投掷步技术是十分必要的。     

对我国优秀男子标枪运动员投掷步技术的研究

本文以我国优秀男子标枪运动员为研究对象,通过影片解析及数据处理,获取其投掷步技术指标。然后与国外优秀运动员进行类比,找出规律及特点;同时具体阐述国内运动员的投掷步幅、投掷步节奏等动作存在的问题,较全面地对投掷步技术进行了定量分析,为促进该技术的教学和训练,提供了定量依据。     

髋部的运动形态对投掷铁饼最后用力的影响

通过对国内外优秀运动员的技术图片分析,结合解剖学和运动生理学的理论,得出在最后用力过程中即使是优秀的投掷运动员也存在着髋关节转动慢,造成髋轴与肩轴扭转角度小,从而使参加运动的肌群不能处在良好的功能状态。同时为了增加投掷半径,过分强调向左侧远伸,造成半径增大了,旋转的角速度却下降了,直接影响投掷成绩。     

优秀男子铁饼运动员掷铁饼最后用力阶段非投掷臂速度变化的运动学分析

运用文献资料法、数理统计法等,对优秀男子铁饼运动员的数据进行分析。结果显示：优秀男子铁饼运动员掷铁饼最后用力阶段非投掷臂制动时机开始应在左脚着地后0.03 s左右或非投掷臂处于方位角180°到220°范围内。优秀男子铁饼运动员非投掷臂转动速度与左肩和右肩转动速度具有高度的相关性,通过相关分析发现非投掷臂与左肩转动速度保持一致,二者基本处于相对静止。部分优秀男子铁饼运动员的非投掷臂摆动方式存在着随着身体转动的一种被动式摆动的错误动作,非投掷臂的摆动是一种主动式的摆动。     

铁饼投掷技术的生物力学研究

本研究通过对我国和世界优秀男子铁饼运动员投掷技术三维影片数据的比较分析,揭示了铁饼投掷技术的一般规律和世界优秀铁饼运动员的技术特点,以及我国优秀男子铁饼运动员的投掷技术特点和存在的主要问题,找出了影响我国铁饼运动技术水平迅速提高的关键因素和技术环节。     

我国优秀标枪运动员投掷步技术分析

通过对我国优秀标枪运动员 2 9人次投掷步技术纪录影片的解析 ,并与世界优秀运动员投掷步有关环节运动学参数变化的对比分析发现 ,我国男子标枪运动员投掷步第 1、2步躯干后倾角过大 ,使第 2～ 3步躯干后倾角变化量相对较小 ,影响了交叉步的动作幅度。我国女子标枪运动员交叉步存在的主要问题是下肢前移幅度不够。男女运动员都存在着投掷步第 4步左膝弯屈程度较大 ,左侧支撑无力的现象。     

我国优秀女子标枪运动员投掷步技术分析

以国内外优秀标枪运动员为研究对象,通过国内外优秀标枪运动员投掷步技术参数的对比,从中找出我国优秀标枪运动员投掷步技术存在的差距,为促进我国标枪运动水平的提高提出方法。     

对我国优秀标枪运动员投掷步技术的研究

以国内外优秀标枪运动员为研究对象,通过国内外优秀标枪运动员投掷步技术参数的类比,从中找出我国优秀标枪运动员投掷步技术存在的差距,为促进我国标枪运动水平的提高提出方法。     

链球投掷技术的生物力学研究

通过对我国和世界优秀链球运动员投掷技术三维影片数据的比较分析,揭示了链球投掷技术的普遍规律和当今世界链球投掷技术的发展趋势和特点,并对我国优秀链球运动员的投掷技术进行了生物力学诊断,找出了影响我国链球运动技术水平迅速提高的关键因素和技术环节。     

如何加大器械出手速度的思考——以掷标枪为例

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。     

Augmented inertial measurements for analysis of javelin throwing mechanics

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.     

The biomechanics of javelin throwing: a review

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.     

Editorial

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.     

我国优秀女子标枪运动员最后用力重心及下肢动作分析

采用运动技术高速摄影和影片解析法 ,对我国部分优秀女子标枪运动员投掷步最后一步重心速度变化和下肢技术动作进行研究分析 ,对影响标枪运动成绩的运动学因子结构进行探讨 ,为广大教练员、运动员和教育、科研工作者的教学、训练实践工作提供参考。     

掷标枪最后用力阶段左侧支撑技术的作用

大量的文献资料研究表明，掷标枪时，在最后用力阶段，左侧支撑技术对形成“满弓”，对标枪出手速度、出手角度以及最后用力的工作距离起着重要的作用     

我国优秀女子标枪运动员助跑速度的测试与分析

采用ＳＣＬ—Ｉ型运动测速雷达,对我国部分优秀女子标枪运动员助跑速度进行了比赛现场测试。经对所获数据的整理与分析后得出：我国优秀女子标枪运动员的助跑水平速度曲线变化不同,助跑的加速形式不同,都具有各自的特点。在今后的运动实践中,运动员应根据自身条件和训练水平,选择能充分发挥速度能力,又不影响最后用力动作完成的助跑形式     

掷标枪最后用力速度特征的运动学分析

采用高速摄像法，运动录像解析法以及比较分析法，对李荣祥掷标枪最后用力阶段身体重心和标枪重心水平速度特征，鞭打动作的速度特征以及其它相关指标所体现出的速度特征进行分析，并指出其技术中所存在的不足。     

我国男子标枪运动员投掷步技术缺陷的原因分析

通过对我国男子标枪运动员和世界优秀男子标枪运动员投掷步生物力学参数的对比,并结合运动生物力学等方面的知识。对现阶段我国男子标枪投掷步技术缺陷的主要原因进行了分析。指出转体是投掷步技术中每一环节的重要组成要素,我国男子标枪技术主要缺陷就是由转体的不完善引起的。通过调整投掷步中各环节的转体幅度和转体时机,可以改正当前我国男子标枪投掷步技术的缺陷。     

标枪运动员专项速度训练模式研究

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。