共查询到20条相似文献，搜索用时 234 毫秒
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一、万能直角计算尺在训练和比赛中的意义铅球投掷的远度主要取决于出手速度、出手角度和出手高度三个因素。在训练和比赛中,如果能用简便方法及时地获取这方面的反馈信息,教练员就能够及时对运动员的技术和能力进行较客观地分析,以便有目地的采取相应措施,进行正确的 相似文献
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铅球投掷最佳出手角度推断的假设检验 总被引：5，自引：0，他引：5
铅球投掷远度完全由出手参数所决定。假定出手速度不变，推算出的铅球最佳出手角度为４２°的结论是值得怀疑的。笔者采用统计学的假设检验方法对此立论加以证明，认为优秀运动员的理想出手角度为３７°～３９° 相似文献
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优秀铅球运动员的运动学分析 总被引：1，自引：0，他引：1
这是一篇对美国几位优秀铅球运动员在比赛时技术的研究报告,本研究考察了几个关键性的投掷技术参数,同时发现了几个有趣的关于优秀铅球运动员技术的结论。前言以前,有关铅球投掷技术的研究表明,出手的速度、角度及高度是获得好成绩的几个最重要的参数。然而,这些数据大都有局限性,因为它们多是少数男运动的一次试投的结论。本研究的目的,是通过考察影响成绩的运动学参数及用四名优秀男 相似文献
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力量训练的科学性和有效性是铅球运动员培养与成材的关键问题,是专项运动成绩迅速稳定地持续提高的保证。从技术原理来讲,铅球成绩取决于三个因素:最快的出手速度、适宜的出手角度以及符合个人特点的出手高度。只有当运动员的快速力量水平和投掷技术都得到良好发展时,才能在投掷过程中处理好以上三个因素,创造优异的运动成绩。 相似文献
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马明 《武汉体育学院学报》2008,42(7):64
基于抛物体运动规律对两类典型的抛物体运动（投掷项目、篮球投篮）进行了分析。在投掷项目中，投掷器械的飞行远度作为目标函数，在Excel中计算了不同的出手速度（V0）、出手角度（θ）及出手高度（H）对器械飞行远度的影响；在篮球运动中，以投篮的最小速度角和最小进篮误差作为目标函数，计算了不同的投篮距离、出手高度的情况下，投篮的最佳出手角度，寻找出篮球投篮最佳出手角的变化规律以便于运动员在实践中掌握和运用，提高投篮的命中率。 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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本文采用文献研究法、三维录像解析法和统计分析法对第11届全运会女子铅球决赛前八名运动员最好成绩投次进行关键运动技术研究,获取她们的部分关键运动学参数,同时和世界级优秀运动员的相应参数进行比较分析,得出相应的研究结果。本论文的主要研究结论为1.背向滑步转身跳投技术按整体动作结构可分为后摆、滑步、过渡、双支撑和最后出手投掷五个阶段。2本研究再次证明了出手速度与比赛成绩呈高度正相关,相关系数达到0.95。而出手角度和其他运动学参数与成绩呈中低度相关。3.本届全运会中冠军巩立娇6次试投平均成绩为19.60±0.46m;平均出手速度为13.47±0.24m/s,与世界级选手接近;平均出手角度为33.99±1.23°,低于世界级优秀运动员;平均出手高度为2.03±0.03m,距离抵制板的水平距离平均为-0.03±0.08m。4.前3名运动员李玲、李梅菊和巩立娇最好成绩投次质心最大分别为速度为2.84m/s、2.65m/s和2.91m/s,质心最大速度与成绩相关性不大。铅球的出手速度为12.69m/s,13.31m/s和13.84m/s,出手角度为38.5°、35.5°和33.9°,铅球的出手高度为2.09m、1.98m和2.06m。 相似文献
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Nicholas P. Linthorne 《Journal of sports sciences》2013,31(5):359-372
The aim of the study was to assess the accuracy of a method of calculating the optimum release angle in the shot put. Using the proposed method, the optimum release angle that produces the greatest flight distance is calculated by combining the equation for the range of a projectile in free flight with the relations between release speed, release height and release angle for the athlete. The method was evaluated using measurements of five college shot-putters who performed maximum-effort throws over a wide range of release angles. When the athletes threw with high release angles, the shot was released from a greater height above the ground and with a lower release speed. For all five athletes, the calculated optimum release angle was in good agreement with the athlete’s preferred release angle. Each athlete had his own specific optimum release angle because of individual differences in the rate of decrease in release speed with increasing release angle. Simple models of shot-putting were developed to explain the relations between release speed, height and angle in terms of the anthropometric and strength characteristics of the athlete. 相似文献
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Optimum release angle in the shot put 总被引：1，自引：0，他引：1
Linthorne NP 《Journal of sports sciences》2001,19(5):359-372
The aim of the study was to assess the accuracy of a method of calculating the optimum release angle in the shot put. Using the proposed method, the optimum release angle that produces the greatest flight distance is calculated by combining the equation for the range of a projectile in free flight with the relations between release speed, release height and release angle for the athlete. The method was evaluated using measurements of five college shot-putters who performed maximum-effort throws over a wide range of release angles. When the athletes threw with high release angles, the shot was released from a greater height above the ground and with a lower release speed. For all five athletes, the calculated optimum release angle was in good agreement with the athlete's preferred release angle. Each athlete had his own specific optimum release angle because of individual differences in the rate of decrease in release speed with increasing release angle. Simple models of shot-putting were developed to explain the relations between release speed, height and angle in terms of the anthropometric and strength characteristics of the athlete. 相似文献
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我国部分优秀男子铅球运动员最后用力阶段某些运动学参数分析 总被引：1，自引：0，他引：1
分析与诊断男子背向滑步推铅球最后用力阶段技术参数,对提高我国男子铅球运动水平具有重要意义.文章选定2004年"菲普莱杯"全国田径大奖系列赛(南京站)男子铅球比赛前6名运动员为研究对象,采用两台JVC9800高速摄像机以50?fps的速度同步拍摄,运用德国SIMI-motion录像解析系统进行图像解析.研究结果显示:最后用力阶段铅球出手速度、出手高度与国外优秀运动员有非常显著性差异,铅球出手角度与世界优秀运动员有显著性差异. 相似文献
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铅球最后用力阶段的数字模型及其解 总被引：1，自引：0，他引：1
本文建立了铅球最后用力阶段的数学模型，讨论了决定铅球飞行远度的三要素间的相互关系，分析了速度角θ，力角α和加速角度α’的力学成因，进而为认识和把握现代铅球技术的本质提供了理论指导。 相似文献
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Young M Li L 《Sports biomechanics / International Society of Biomechanics in Sports》2005,4(2):131-148
The aim of this study was to determine if critical parameters for elite performance could be identified among a population of female shot putters. The performance of seven of the top women shot putters competing at the 2002 USA National Championships was examined. Video data were captured using two Panasonic 60 Hz cameras and the best throws of each athlete were digitized and analyzed using a Peak Motus three-dimensional motion analysis system. Thirty variables were examined for their effect on the distance of the throw. Correlation analysis indicated that measured distance was positively correlated with release speed (r = 0.97, p < 0.0003) and shoulder-hip separation (r = 0.72, p < 0.06) and negatively correlated with release angle (r = -0.74, p < 0.056), rear knee angle at rear foot touchdown (r = -0.93, p < 0.003) and rear knee angle at release (r = -0.76, p < 0.047). Greater knee flexion angle at both rear foot touch down and release along with a neutral shoulder-hip angle at release were identified as the most critical parameters for success among this sample of elite women shot putters. The unique observation about the knee positions at specific events should assist in new training and coaching developments. 相似文献
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Gareth Irwin 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):131-144
Abstract The aim of this study was to determine if critical parameters for elite performance could be identified among a population of female shot putters. The performance of seven of the top women shot putters competing at the 2002 USA National Championships was examined. Video data were captured using two Panasonic 60 Hz cameras and the best throws of each athlete were digitized and analyzed using a Peak Motus three‐dimensional motion analysis system. Thirty variables were examined for their effect on the distance of the throw. Correlation analysis indicated that measured distance was positively correlated with release speed (r = 0.97, p < 0.0003) and shoulder‐hip separation (r = 0.72, p < 0.06) and negatively correlated with release angle (r = ‐0.74, p < 0.056), rear knee angle at rear foot touchdown (r = ‐0.93, p < 0.003) and rear knee angle at release (r = ‐0.76, p < 0.047). Greater knee flexion angle at both rear foot touch down and release along with a neutral shoulder‐hip angle at release were identified as the most critical parameters for success among this sample of elite women shot putters. The unique observation about the knee positions at specific events should assist in new training and coaching developments. 相似文献
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铅球最佳投出角问题新探 总被引：7，自引：0，他引：7
为了解决铅球适宜投出角度公式与实践偏离的问题，分析了铅球成绩与抛体最大射程的函数关系，得出了最大成绩定理、“新”最佳投出角度公式和最佳出手角度标志线参数式。抽样检验和空气动力学实验指出，新公式能够准确地描述出高、中、低各种水平铅球运动员的适宜出手角度。 相似文献
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对我国优秀女子铅球运动员背向滑步推铅球技术的研究 总被引：5，自引：0，他引：5
以九运会女子铅球的前8名运动员为研究对象,采用文献资料调研、数理统计、影像分 析等方法进行分析研究。结果表明:我国优秀女子铅球运动员在滑步阶段,左腿有效摆动不足, 右腿蹬伸力量、速度不佳。脱离身体重心运动速度而片面要求滑步阶段的运动速度越快越好是 不合理的。在过渡阶段,右髋向投掷方向的前移不够,不利于身体重心速度的回升。最后用力阶 段,技术还不稳定,出手角度与出手速度之间的组合应该因人而宜,而不宜采用固定的理论模 式。 相似文献
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介绍了三维数字测力铅球研制的设计思想、主要结构、功能及技术参数，并结合录像对实际测量结果进行分析与评价。采用的仪器是目前使用较为广泛的单片机微电脑处理系统和成熟的压力传感技术，通过和专项器械铅球相结合，实现了对实际运动中肢体游离端动态力的测量，能够快速、便捷、准确地反馈运动员在整个投掷过程中的用力特点，可以协助教练员对运动员进行技术诊断，制定科学的训练计划。 相似文献
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Linthorne NP Everett DJ 《Sports biomechanics / International Society of Biomechanics in Sports》2006,5(2):243-260
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