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如何提高乒乓球的发球质量 总被引：2，自引：0，他引：2
一、高质量的发球我们知道发球主要决定于击球力量和击球部位,球拍对球产生作用力和作用力通过击球的部位决定球的旋转（如下表）。判断一个发球质量的好坏,其质量要素取决于速度、旋转、落点。笔者通过实际训练发现只有从发球旋转变化、球的落点、球的速度上下功夫,才... 相似文献
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从心理学认知角度,将被试按运动等级分为专家组和新手组,运用高速摄像等方法,研究乒乓球运动员在不同时间和空间阻断条件下接发球落点及旋转判断的反应时及准确性.结果表明:2组运动员不同时间阻断对发球旋转性质判断的准确性和反应时均有显著性差异;对发球落点判断的准确性和反应时专家组优于新手组;2组运动员不同空间阻断对发球旋转性质及落点判断均有显著性差异;在落点和旋转判断上,球拍阻断部位低于躯干阻断部位,躯干阻断部位低于头部阻断部位.优秀运动员能够在短时间内综合更多有效信息对发球旋转和落点作出有效判断,此能力可作为考察能否成为优秀运动员的重要指标. 相似文献
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一、前言1983年在东京举行的第37届世界乒乓球锦标赛期间,国际乒联通过一项决议,决议规定从1984年1月1日起,凡使用两面不同性能的球拍,必须用颜色来加以区别。毫无疑问,这项规定对于以发球或搞旋转变化作为得分主要手段的我国选手来说,将是非常不利的。因为对球拍的使用加以一定限制后,发球抢攻和搞旋转变化 相似文献
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发球若想迷惑对方，保持发球的隐蔽性，从准备发球到球拍触球的这段时间内，任何动作细节皆需尽量做到一致，其中包括站位的角度、抛球的高度、引拍和挥拍的轨迹以及球拍触球时身体的合力点。这一系列的动作尽可能地保持一致，但球的旋转要有较大的差异，如此就会给对方的判断造成一定的难度。 相似文献
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发球是网球运动中至关重要的技术,网球一发的速度快、攻击范围广,成功率较高.统计发现,在职业赛事决胜期发球局中,36.6%的得分由一发或结合前3拍进攻获得.发球至上是一代"球王"桑普拉斯的获胜秘诀,网坛名将阿加西的发球成功率达62.66%.2004年澳大利亚网球公开赛上,5人的平均发球速度超过210km/h.2004年9月25日,美国选手罗迪克创造7249km/h的发球时速世界纪录.影响网球发球攻击性的主要因素是发球速度和攻击范围,如何从这两个方面提高网球发球的攻击性,是教练员和运动员面对的主要问题.本文以右手持拍为例进行论述. 相似文献
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优秀网球运动员发球技术特征分析 总被引：6，自引：0，他引：6
应用计算机技术及CAI软件功能,并结合生物力学原理,研究、解析桑普拉斯和阿加西发球技术的主要特征所在,包括完成发球技术动作的时间特征;抛球与过渡阶段技术环节主要特征;向后、向前挥拍阶段动作技术特征;从理论上和实践中分析其优势特征的合理性、实效性.主要结论:桑普拉斯和阿加西两人发球时,抛球技术动作连贯、稳定、位置准确、抛球落差小、抛球臂肌肉感觉精细,向后、向前挥拍时间短,充分合理地运用了躯干侧弓、背弓、下肢肌群转动用力及上肢挥臂旋内动作,使发球动作过程,肌肉工作群协调有力,从而形成了发球技术动作时间短、速度快、力量大、落点刁的效果. 相似文献
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曹东胜 《体育科技文献通报》2008,16(11):17-18,28
通过文献资料和比赛录像技术,对桑普拉斯与费德勒2007年三场比赛,分别进行统计与分析。我们用数据揭示两代网坛天王在比赛策略、战术和技术等方面的特点,希望能窥视到现代网球的发展趋势,促进网球在中国的普及与提高。 相似文献
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Javier Maquirriain Roberto Baglione Marcelo Cardey 《European Journal of Sport Science》2016,16(7):845-849
The potential effect of fatigue on stroke production in tennis players is still controversial. The aim of this study was to analyse the tennis serve speed and accuracy in prolonged male professional matches played on grass courts. We analysed tennis serve statistics from five-set Wimbledon matches (n?=?15; 30 players). Results showed that match duration averaged 208.3?±?28.3?min. The overall serve speed was 177.0?±?10.2?km/h in the first set and 176.1?±?11.7?km/h in the fifth set (p?=?.34). The difference of all accuracy values of first set serves was not significantly different from those of the fifth set: percentage of valid first serves, 63.1?±?11.1% vs. 62.3?±?11.8%, respectively (p?=?.78); percentage of “aces”, 11.2?±?9.1% vs. 10.0?±?8.9%, respectively (p?=?.39); percentage of “winners”, 2.6?±?7.6% vs. 1.2?±?2.2%, respectively (p?=?.36); percentage of “double faults”, 2.8?±?3.0% vs. 2.8?±?3.4% (p?=?.97). In conclusion, tennis players were able to maintain constant serve speed and accuracy over five-set matches played on grass courts. Professional tennis players are capable of overcoming fatigue and/or make movement adjustments to effectively perform complex technical strokes like the serve throughout matches played on grass courts lasting more than 3?h in average. 相似文献
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乒乓球运动员应加强快速、准确、灵活的步法训练 总被引：1，自引：0，他引：1
论述了乒乓球运动员在短时间内,根据来球方向、速度、落点以及旋转等快速作出判断时步法移动的重要意义,并提出一些训练措施。 相似文献
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通过对2002—2011年四大网球公开赛的发球进行长期跟踪研究,结果表明:世界网球运动在过去的十年中发生着很大的变化。发球速度在不断增加,ACE球数量不断增多,双误的数量持续减少;运动员的发球速度与身高呈正相关,获胜方平均身高一般比对手高1～2cm,发球时速平均快2～4km;在所有的场地上,运动员的发球局优势越来越明显,尤其是温网,出现抢七的几率最高,每盘打的局数最多;法网的发球速度在大幅增加,但ACE球的数量少于其它3个大满贯网球赛事。 相似文献
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随着计算机技术在各个领域的应用日益广泛,计算机仿真技术在体育中的应用也越来越多地受到关注。本文首先运用3D软件构建一个网球发球过程模型,在此模型内不断调整发球模型中击球点的高度,来观察发球有效面积和球速的变化情况;然后利用CAD软件输出3D模型效果图并利用CAD软件里面的面积计算功能对发球有效面积进行计算;第三利用SPSS15．0软件和EXECL软件对所得数据进行统计和分析;最后用真实的量化数据来说明网球发球过程中击球点高度对发球效果的具体影响。 相似文献
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影响发球质量的因素是多方面的。运用文献资料法、录像观察等方法主要从发球的技术动作、发球的落点和旋转等方面出发,分析和探讨了网球运动中发球质量的影响因素,从而通过有计划、有针对性的训练来提高发球的质量。 相似文献
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The precise influence of serve type and serve ball speed on beach volleyball performance is unclear. We examined the relationship between serve type and speed and their effectiveness during the 2008 Men's and Women's Open World Tour Tournament. Three hundred and seventy-eight and 375 serves performed by men and women respectively from the main draw tournament were analysed. Serve speed was recorded using a radar gun. Two expert observers recorded serve speed, serve mode, serve effectiveness and rally outcome. There was no relationship between serve speed and its effectiveness for men (r = -0.047, P > 0.05) and for women (r = -0.048, P > 0.05). However, there was a relationship between serve ball speed and its effectiveness both for men and women, when speed was categorised into three groups. There was a better balance between negative and positive outcomes at medium speeds for men and at low and high speeds for women. There was a relationship between ranking and serve ball speed only for women and between ranking and type of serve for both genders. There was no relationship between rally outcome and serve effectiveness. The combination of high ball speed and jump serve is characteristic of high ranking women but not of men. 相似文献
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跳远运动员专项速度能力分析研究 总被引：3，自引：0，他引：3
邹克宁 《武汉体育学院学报》2002,36(3):68-70
对国内外优秀跳远运动员的专项速度能力进行分析并进行灰色关联分析，结果表明，组成跳远运动员专项速度能力的因素群为：绝对速度、速度耐力，速度力量，助跑速度等12项因素，与跳远成绩关联度最大的是立定三级跳远，其次是最后50m助跑速度。建议在跳远教学与训练中高度重视专项速度能力的培养，并运用所得方程检测评价运动员的速度能力。 相似文献
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38mm乒乓球改为40mm乒乓球,使乒乓球在运行中的速度、旋转、反弹角度等发生了相应的变化,增加了击球回合次数,提高了乒乓球运动的观赏性,同时也给乒乓球运动的技术动作和打法带来了新的挑战。必须了解各种变化,调整技术动作,才能更好地掌握乒乓球技术,提高运动技术水平。 相似文献
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Frantisek Vaverka Miroslav Cernosek 《Sports biomechanics / International Society of Biomechanics in Sports》2016,15(1):48-60
A method is presented for assessing the serve speeds of tennis players based on their body height. The research involved a sample of top world players (221 males and 215 females) who participated in the Grand Slam tournaments in 2008 and 2012. The method is based on the linear regression analysis of the association between the player’s body height and the serve speed (fastest serve, average first-serve, and second-serve speed). The coefficient of serve speed (CSS) was calculated as the quotient of the measured and the theoretical value of the serve speed on a regression line relative to the player’s body height. The CSS of >1, 1 and <1 indicate above-average, average, and below-average serve speeds, respectively, relative to the top world tennis players with the same body height. The CSS adds a new element to the already existing statistics about a tennis match, and provides additional information about the performance of tennis players. The CSS can be utilised e.g. for setting the target serve speed of a given player to achieve based on his/her body height, choosing the most appropriate match strategy against a particular player, and a long-term monitoring of the effectiveness of training focused on the serve speed. 相似文献