抛球的三点一线

大多数球友在练习发球动作的过程中,经常不断强化引拍、挥拍、随挥等一系列持拍手的动作,而作为完整发球动作的开端——抛球,通常会被大家所忽视。这是一个误区。实际上,在发球的动作中,抛球的练习极为重要,因为它是直接决定发球稳定性和威胁力的重要环节之一。     

发球先抛球

平击发球,对肩部的灵活性要求较高,因此在开始练习前,李丽教练要求大家把肩部充分活动开,一来可以避免受伤,二是可以发出效果好的平击球。     

排球发球中抛球稳定性的实践研究

“发球”是排球课教学的主要内容之一,在教学中由于初学者对关键动作掌握不好影响了“发球”质量,从而导致发球动作的偏差和失误。本文主要以上手发球教学为例,通过“抛球”这一重要技术环节,进行理论分析和实践研究,以达到提高排球课教学质量的目的。     

最是那一抛的精彩——发球中抛球动作的练习

正确高效的抛球是成就一记成功发球的先决条件,要实现好的发球,必须先练好抛球。     

帕特·卡什发球讲座让人无法预判的发球

大家都知道没有好的抛球就无法保证发球质量,为什么女选手的抛球普遍存在问题？您认为抛球质量最高的是哪位选手？稳定且高质量抛球的关键是什么？     

向王励勤、马林学习正手发璩（下）——掌握十个要点，胜他人一筹

初级水平的选手发球时，为了防止触球击空，从抛球至触球都必须盯住运动中的球。对于已经完全掌握了发球节奏感的选手，就不能自始至终光盯着球了，在击球前的一瞬间，要用眼睛余光注意对手的动向。     

古代抛球运动考

运用文献资料法考察我国古代抛球运动的发展情况.认为抛球在古代可以大致分为三大类型:一是作为节俗及日常游戏,丰富了古代休闲体育生活;二是作为体育娱乐表演,促进了诗、乐、舞等多种艺术形式的发展;三是作为竞技比赛,在较量技艺乃至军事训练中起到积极作用.     

世界级选手的击球技巧（下）

增强发球旋转 吴尚垠的发球以发高抛球为主：“把球抛高，利用球落下时的速度可以发出旋转更为强烈的发球。”在击球瞬间，要找到最佳的击球点，还要体会用胶皮摩擦球的感觉。     

直板选手的钧子发球

张蔷使用心得： 1、正手钩子发球的动作相对比较紧凑。抛球时的弧度不用太高,但手臂向后引拍的动作要做充分,根据自己想要发出什么样的球去调整拍形。     

小细节,大分别 平击发球与上旋发球的区别

平击发球时的握拍和抛球方式与发上旋球时截然不同,只要掌握了几个关键要点,就能自如收放,达成想要的效果。     

2011北京国际网球挑战赛：畅玩无极限

7月30日-8月7日,第二届北京国际网球挑战赛再次在国家网球中心激情上演。作为中国网球公开赛的提前预演,北京国际网球挑战赛将给年轻小将和低排位选手提供一个展示自我的机会。赛场之外,以“网球梦工厂”为主题的网球嘉年华活动．把北京国际网球挑战赛“装点”成为一次全民同乐的网球娱乐盛宴。下面,《网球》杂志将带领大家,去先睹为快2011北京国际网球挑战赛的各种精彩活动。     

他们是历史上最伟大的发球手（下）

＂当格朗进入状态,他的发球在草地上几乎无人能接,＂桑皮拉斯在他的自传《A Champion＇s Mind》中写道。＂他是唯一能让我在比赛中,感觉受到其怜悯的家伙。因为一旦他保持发球状态,发球局几乎固若金汤。当然,在与鲍里斯·贝克尔比赛时,也会有这样的感觉。＂     

他们是史上最伟大的发球手（上）

网球史上有哪些选手的发球可以配得上＂伟大＂二字？他们的发球具有哪些特点？本刊将在近两期杂志中,对从网球运动起源开始至今最好的发球手进行归纳汇总,通过分析他们的特点,找到发球技术的精髓。     

重视投篮意识的培养与训练

篮球运动中任何一项技术的提高都是从意识的提高开始。意识贯穿于篮球运动的始终。因此,重视其意识的培养,是每一个运动队面临的重要课题和迫切需要解决的问题。     

《全运会信息专刊》为内蒙古自治区备战第11届全运会服务的研究

运用文献资料法、数理统计法及实地访谈法对《全运会信息专刊》为内蒙古备战第11届全运会进行了分析。从多个维度剖析《专刊》服务性的基本特征与作用。《专刊》服务性的基本特征表现为：信息化、决策化、基础化、专业化、科学化。据此提出《专刊》＂信息保驾护航＂的重要服务效应。     

A Comparison of Two Methods of Teaching the Tennis Serve

Abstract

This study was designed to compare the effectiveness of two methods of teaching the tennis serve. College women (N=123) in six tennis activity classes at Georgia Southern College participated. The experimental group of 60 students started serving from the service court line and were gradually moved back to the base line. The control group of 63 students began serving from the base line in the traditional manner. After five weeks of practice both groups were given the same tennis serving test for accuracy and speed. The study showed no significant differences in the two teaching methods.     

中国男子排球队接发球阵式的探讨

由于新规则的实行 ,中国男子排球队的接发球阵式已不能适应快速发展的发球技术的需要。本文通过对中国男子排球队在 1999年世界杯男子排球赛的电视现场观察和技术统计 ,运用运动心理学和分析推理方法提出 :后排 4人的接发球阵式可以适应快速发展的发球技术的需要 ,提高接发球的到位率 :“4- 2”阵式配备可以做到后排 4人接发球 ,提高防反效果 ,同时不影响一攻的效果。     

A Determination of Velocities and Angles of Projection for the Tennis Serve

Abstract

The purpose of this study was to determine the minimum and maximum velocity of the tennis ball for selected heights of contact and angles of projection and wall impact points during the tennis serve. By use of a ballistics formula, a number of variables which determine the trajectory of the tennis ball were programed for the computer. Tables were tabulated and are available for all data gathered. Angles of projection from the horizontal were selected to range from ?5° to 15° in increments of 1°. Velocity of the serve ranged from a low of 30 ft. per second to a high of 176 ft. per second. Finally, the height of the contact point ranged from a low of 6.0 ft. to a high of 9.0 ft. in increments of .5 ft. Height of the ball when crossing the net (impact point on the practice court) ranged from a low of 3.01 ft. to a high of 8.47 ft. The minimum height at crossing was achieved at 6.5 ft. service height, a ?3° angle of projection and time from baseline of .30 sec. This is a relatively high velocity serve. In contrast, the maximum height over the net of 8.47 ft. was achieved at an 8.5 ft. service height, a 15° angle of projection, and time of .79 sec. to point of impact. These data indicate that at higher service heights and slower velocities, a ball can hit the impact area as much as 8.47 ft. from the floor, 4.47 ft. above the net and still remain in the service court.     

链球运动员的运动调节训练

实施运动调节训练的有益之处是使运动员运动系统的稳定完善具有一定规律性。一开始,身体对任何新的活动都会产生反应,这对最初的运动成功来说是很好的。接下来的进展更具有选择性,并且受运动细节和外部因素特性的调节。在这种调节下,身体的一种系统可能会得到重要的发展,而其他系统相对少一些。这取决于它们各自在运动活动需要中的作用。     

A Practical Tennis Serve Test: Measurement of Skill under Simulated Game Conditions

The Avery-Richardson Tennis Service Test was constructed to maximize the practical relationship between skills tests and playing situations. The test incorporates the game-like criteria of two balls per trial, service attempts to both right and left service courts, and comparable credit for flat, slice, and spin serves. In addition, norms were established for both college males and females at beginning and intermediate skill levels in tennis. Construct validity was established for the service test. There was a significant difference [F (1, 306) = 30.18, p < .00001] between beginning males and intermediate males, as well as a significant difference [F (1, 334) = 48.39, p < .00001] between beginning and intermediate females. To determine reliability, 93 males and 59 females were given the test on two separate occasions. Cronbach's alpha coefficients were calculated with resulting reliability estimates which ranged from .64 to .80 for the groups studied.