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1.
腾起角——提高我国男子跳远成绩的有效途径   总被引:1,自引:0,他引:1  
通过文献资料的研究分析发现我国优秀跳远选手在腾起角度上与国外优秀选手相比较有者显著差异,在腾起初速度上两者却无明显差别。在对腾起角进行的研究中,发现腾起角度在提高我国优秀跳远选手成绩上有重要意义。并通过对其影响因素的分析,提出提高我国优秀跳远选手成绩的重要途径。  相似文献   

2.
通过1992年全国田径冠军赛14名女子跳远运动健将的起跳技术的科学分析,意在指出合理的腾起角对跳远成绩的重要影响,为改进我国女子跳远技术、提高运动成绩提供一些参考。  相似文献   

3.
本文通过查阅大量国内外有关跳远技术方面的文献资料,并采用数理推论法阐述了腾起角在跳远中的作用,主要分析腾起角与速度利用率、垂直速度、下肢起跳工作机群的退让收缩能力的关系,并对最佳腾起角进行探讨和分析。  相似文献   

4.
深入探讨远运动最佳腾起角的运动生物力学公式,分析了身体垂直速度、水平助跑速度利用率与最佳腾起角和跳远成绩的关系。以理论和大量技术数据为依据,指出起跳时身体垂直速度利用率对跳远成绩起着至关重要的作用。  相似文献   

5.
中外优秀女子跳远运动员有关技术参数的运动学研究   总被引:8,自引:1,他引:7  
通过对中外优秀女子跳远运动员有关技术参数的对比分析,认为提高我国运动员的绝对速度、增大腾起的垂直速度和角度、获得腾起初速度和腾起角度的最佳匹配是提高其跳远成绩的主要途径.  相似文献   

6.
中外男子跳远技术的发展趋势   总被引:1,自引:0,他引:1  
吴玲  魏家骏 《安徽体育科技》2004,25(2):18-20,30
通过对中外男子跳远技术的发展趋势的比较和分析,发现我国男子跳远运动员的平跑速度较慢,起跳能力较差,腾起角相对较小,是造成我国男子跳远成绩偏低的重要因素.笔者认为,在今后的跳远训练中,应在保持较高速度利用率的基础上,合理增大腾起角,提高平跑速度,完善起跳技术.  相似文献   

7.
1、中外优秀跳远运动员起跳阶段技术参数技术分析从起跳技术参数指标分析,水平速度高是取得优异成绩的基础,但并非取得优异成绩的唯一条件。起跳后,水平速度将分解为腾起水平速度和腾起垂直速度。合理的起跳技术是尽量减少水平速度损失,获得最大的腾起垂直速度。因此,影响我国跳远成绩的主要技术问题是腾起角度。  相似文献   

8.
对影响我国优秀跳远运动员起跳垂直速度的因素分析   总被引:3,自引:0,他引:3  
根据我国跳远运动现状,采取文献资料法和对比分析的方法,对影响我国跳远运动成绩的因素——腾起垂直速度加以分析,认为提高绝对速度,合理利用助跑速度,形成良好助跑节奏,提高起跳腿支撑缓冲能力,加快摆动速度都有助于运动员获得适宜的腾起垂直速度,能使运动员获得理想的运动成绩。  相似文献   

9.
李超雄 《山东体育科技》2002,24(4):38-39,41
通过对普通高校学生跳远助跑最后10米适宜速度的变化测试,发现速度与相应的腾起角以及抛射的远度有直接影响,实验结果显示:适宜的速度明显优于最大限度发挥助跑速度的成绩。  相似文献   

10.
本文运用几何方法探讨跳远中腾起角、落地角和远度三者之间的关系。指出远度与△OAB的面积成正比,并提示注意调节落地角φ。  相似文献   

11.
对优秀男子跳远运动员助跑速度与起跳角度的研究   总被引:1,自引:0,他引:1  
跳远属于斜抛运动,根据斜抛运动远度公式S=V~2sin2a/g可知,跳远的成绩与腾起初速度(V)和腾起角(a)有关。通过对中外优秀男子跳远运动员跳远技术的对比分析,发现我国男子跳远运动员提高成绩可以通过两种途径:一是提高绝对速度,同时适当降低助跑速度利用率,改进助跑最后几步的节奏,二是增大着板角和离地角,减小扇角,提高腾起角。  相似文献   

12.
运用多刚体模型及现代计算机仿真技术,探讨人体在不同姿势下踏板所引起的跳远远度的变化特征,以寻找最佳的起跳着板姿势。结果表明:着板时小腿的姿态角、膝关节角不同组合可以使人体获得相同的远度,故仅凭着板角的大小来衡量着板技术的优劣显然是不合理的;跳远踏跳着板时刻、人体各环节姿态角对跳远距离的影响作用大小并不一致,其重要性排序依次为踏跳腿小腿的姿态角最重要,其次是踏跳腿的膝角,而躯干斜角、大腿夹角及摆动腿的膝角对跳远距离的影响相对较小;运动员在跳远踏跳着板时刻,一定存在一个最佳的踏跳腿膝关节角和小腿与地面的夹角,以这种方式上板,可获得最大的跳远距离。  相似文献   

13.
The purpose of this study was to analyze the kinematic variables that determine the performance of the standing long jump in children 6- to 12-years-old. There were 121 healthy children (58 girls) recorded while they performed the standing long jump test. All kinematic variables showed a significant correlation with calculated jump distance and measured jump distance, except for the knee joint angle at maximum shoulder extension angle, ankle joint angle at maximum shoulder extension angle, and shoulder joint angle at maximum knee flexion angle. Stepwise multiple regression analysis showed that sex, age, and body mass index accounted for 51.1% of the jump distance variance. Among all the kinematic variables, take-off distance and take-off speed were accounted for the most of the variation in the jump distance. Physical education teachers and coaches should consider special attention to these anthropometrics and kinematic aspects in improving the standing long jump performance in children.  相似文献   

14.
单信海 《体育科学》2004,24(3):24-26
利用 Vbasic语言 ,根据无空气阻力下铅球飞行抛物线原理 ,编制了一套铅球飞行轨迹动态模拟软件。软件是由飞行轨迹动图、指标设计和飞行远度三维图像等 3个部分组成。该软件具有人机交互功能 ;动态图像形象、生动 ,是集教学与科研于一体的辅助性工具  相似文献   

15.
跳远过程中几个技术动作的力学分析   总被引:2,自引:0,他引:2  
对跳远的运动过程、落地时的身体的理想倾角等进行了力学分析。分析过程考虑了重心落差、起跳时身体倾角、滞空时间内身体的旋转、落地时重心高度等对跳远距离的影响,得到并分析了两个跳远公式。  相似文献   

16.
三级跳远技术的重点、难点及其练习手段   总被引:4,自引:2,他引:2  
通过查阅文献资料,结合多年三级跳远技术教学训练的实践经验,提出了三级跳远技术教学的重点与难点,并据此提出了相应的练习手段。  相似文献   

17.
This paper describes the results of a numerical study to determine the optimal flight technique for V-style ski jumping. We attempt to answer the question of how a jumper should fly in order to increase their flight distance in a V-style posture. The index of performance in this optimization study is the horizontal flight distance, which is mathematically equivalent to the total flight distance, and the control parameters are the ski-operning angle and the angle of forward lean that the jumper employs (the body-ski angle). The flight trajectory is simulated on the basis of an aerodynamic database constructed from wind tunnel test data. It is found that the ski-opening angle should be increased in the first half of the flight, and then maintained at a constant value during the rest of the jump. Optimal control of the ski-opening angle when there is either a headwind or tailwind is also discussed. It is found that the jumper needs to control the skiopening angle over a wider range in the case of a headwind than in the case of a tailwind. The jumper's skill in controlling the ski-opening angle is very important for increasing the flight distance, especially in the case of a tailwind.  相似文献   

18.
跳远起跳速度研究综述   总被引:17,自引:0,他引:17  
采用文献综述法,对影响跳远起跳速度的有关因素进行分析。结果表明:提高助跑速度和助跑最后二步节奏,有利于加快起跳速度;适宜的阗地角是加大上板速度、获得较大冲击力的前提;较早的蹬伸能获得较长的重心工作距离,缩短起跳时间,提高起跳效果。  相似文献   

19.
We investigated the release angle that maximizes the distance attained in a long soccer throw-in. One male soccer player performed maximum-effort throws using release angles of between 10 and 60 degrees, and the throws were analyzed using two-dimensional videography. The player's optimum release angle was calculated by substituting mathematical expressions for the measured relationships between release speed, release height and release angle into the equations for the flight of a spherical projectile. We found that the musculoskeletal structure of the player's body had a strong influence on the optimum release angle. When using low release angles the player released the ball with a greater release speed and, because the range of a projectile is strongly dependent on the release speed, this bias toward low release angles reduced the optimum release angle to about 30 degrees. Calculations showed that the distance of a throw may be increased by a few metres by launching the ball with a fast backspin, but the ball must be launched at a slightly lower release angle.  相似文献   

20.
The aim of this study was to determine the influence of run-up speed on take-off technique in the long jump. Seventy-one jumps by an elite male long jumper were recorded in the sagittal plane by a high-speed video camera. A wide range of run-up speeds was obtained using direct intervention to set the length of the athlete's run-up. As the athlete's run-up speed increased, the jump distance and take-off speed increased, the leg angle at touchdown remained almost unchanged, and the take-off angle and take-off duration steadily decreased. The predictions of two previously published mathematical models of the long jump take-off are in reasonable agreement with the experimental data.  相似文献   

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