世界优秀网球单打选手首末盘发球战术及效果分析

采用文献资料、录像观察、逻辑分析和数理统计等方法,对2004-2006三届网球大师杯14场单打比赛15名选手首末盘比赛的发球战术运用情况进行比较分析,并揭示世界优秀网球单打选手首末盘发球战术及效果的变化特点和规律,旨在为我国网球的科学训练和教学提供依据。     

基于系统论的网球发球教学研究

总结网球的发球技术和战术,在此基础上,深化研究发球技术理论体系对于网球技术的影响,指导网球实践技术活动。在发球技术环节的传统相关理论研究基础上,重点从更新和深化相关内涵,丰富相关网球发球理论体系。     

网球发球战术特征分析——以德约科维奇为例

本文采用录像观察法、文献资料法、比较分析法、数理统计法这四种研究方法,对德约科维奇参加的2015年美国网球公开赛的7场比赛进行录像观察,得出结论:（1）在发球直接得分率、发球成功率方面,一区和二区无明显差异,但ACE球在个数和百分率上都明显高于二区。（2）在ACE球、发球直接得分率、第一发球成功率方面,外角球无论是在个数还是在百分率上都高于内角,且存在较大的差异。（3）在发球直接得分率和第一发球成功率上,二区内角高于一区内角且存在较明显的差异,但在ACE球和第二发球成功率上是一区内角大于二区内角,且差异较大。     

世界优秀网球运动员发球落点分布区域分析

采用文献资料法、影像分析法、数理统计法,对世界优秀网球运动员在2009年澳大利亚网球公开赛中的每个发球所在区域的落点进行统计分析,归结出世界优秀网球运动员发球落点的区域分布规律,旨在为推动网球发球技术和质量的提高以及为网球运动员和广大网球爱好者提供参考依据。     

中外女子网球优秀单打选手发球技术特点的比较研究

运用文献资料法、观察法和比较分析法等,分别对我国女子优秀选手和国外女子优秀选手比赛中的发球进行观察统计,对她们发球技术特点进行比较分析,找出我国选手的优势与不足,旨在为我国女子网球发球水平的提高提供理论依据。     

2018年优秀网球男单运动员关键分时的发球落点分析

运用文献资料、数理统计等方法,分析2018赛季年终排名前二十的优秀网球男子单打运动员在关键分时发球落点的分布情况。研究结果显示:（1）在关键分一发时,运动员发球落点以内角区和外角区为主,其中发外角区的比例最高,发中区的比例为最少;（2）在关键分二发时,在落后时发中区的比例最高,在平分时发中区的比例最小,在平分时发外角区的比例最小,在占先和落后时发内角区的比例最小。     

优秀男子网球运动员发球效果分析

目的通过对四大满贯1/8决赛至决赛共43场比赛,对运动员发球速度、角度、进球个数和得分个数的相关数据进行收集整理。方法通过文献资料法、录像观察法、数理统计法、逻辑分析发等方法进行统计分析,对优秀男子网球选手发球速度、角度、得分率进行研究。结果一发平均速度大于与二发平均速度存在显著性差异,一发外角和内角速度无显著性差异而与中间存在显著性差异,二发速度与角度无显著性差异。一发外角得分率和内角得分率大于中间得分率存在显著性差异,二发得分率不同的区域和角度均无显著性差异。从发球数量上看,不同区域一发发球角度优先选择外角和内角,二发平分区首先选择外角,二发占先区发球首先选择中间角度。结论网球发球不同的落点、速度和得分率直接影响发球的效果,快速的发球速度可以提高发球得分率。     

对世界优秀男子网球运动员不同站位发球技术的运动学对比分析

目的:网球比赛发球站位基本包括上步式站位(foot-up,FU站位)和分腿式站位(foot-back,FB站位)两大类,而用哪一类站位动作发球效果更好,在国内外网球界有歧说。通过在比赛现场高速摄像,经3D解析结合VR技术对世界优秀男子网球运动员不同站位发球技术的运动学对比分析。方法:在2018年成都网球公开赛比赛现场应用高速录像拍摄决赛,选取冠军托米奇(FU站位)、亚军弗格尼尼(FB站位)各7次发球动作技术三维解析,获得运动学参数,导入VR技术系统进行对比分析。结果:托米奇采用FU站位发球开始右脚上步,人体获得动能通过下肢制动转化为下肢肌肉弹性势能储存起来,紧接着起跳再释放,获得较大的地面垂直反作用力,增加身体重心垂直位移的高度。同时,抛球离手速度较快。托米奇在向后引拍阶段用时较短,右髋角速度更快,有利于增加下肢向击球方向的转动速度以及起跳速度。不仅获得了更合理的击球高度,而且球拍触球时刻各关节速度均快于弗格尼尼,使鞭打击球动作更连贯。同时,球最高点与击球点的垂直距离更小,使击球高度的稳定性更高。在挥拍触球时刻,弗格尼尼击球点多数更靠前,球拍击球点在甜区上缘。托米奇击球点在甜区,比弗格...     

中外优秀女子网球运动员单打发球技战术特征的对比分析

运用文献资料法、对比分析法、录像观察法、数理统计法、专家访谈法等研究方法,对2010年澳大利亚网球公开赛中的女子单打八强的发球技战术特征进行了统计和对比分析,找出中国选手与国外优秀女子网球运动员发球技战术特征的不同之处,发现其优势和不足。     

浅析乒乓球发球抢攻战术的运用

前言：战术：进行战斗的原则和方法。研究带有局部性的战争指导规律,是战术学的任务。战术是一种综合运用技术、心理和身体素质的方法,在乒乓球比赛中,为扬长避短,以争取胜利而有目的地使用各种技术的方法叫做乒乓球战术,其目的就是乒乓球运动员为争取比赛胜利。乒乓球的战术一般是由两种或两种以上的单项技术结合运用而构成,在特殊情况下,一种单项技术也可构成战术,故乒乓球的技术是战术的基础。     

对世界优秀乒乓球女双选手李恩实/石恩美的技战术分析与研究

世界优秀乒乓球女子双打选手李恩实／石恩美(韩国)近年来在世界大赛保持着较好的战绩，是中国乒乓球队女双的头号劲敌。通过对她们的发球、发球抢攻、接发球段和相持段的技、战术特点进行分析，以期为中国乒乓球女双备战国际大赛提供参考。     

Measurements of the horizontal and vertical speeds of tennis courts

Tennis courts are normally classified as fast or slow depending on whether the coefficient of sliding friction (COF) between the ball and the surface is respectively small or large. This classification is based on the fact that the change in horizontal ball speed is directly proportional to the COF if the ball is incident at a small angle to the horizontal. At angles of incidence greater than about 16° it is commonly assumed that the ball will roll during the bounce, in which case one can show that the ratio of the horizontal speed after the bounce to that before the bounce will be 0.645 regardless of the angle of incidence or the speed of the court. Measurements are presented showing that (a) at high angles of incidence, tennis balls grip or ‘bite’ the court but they do not roll during the bounce, (b) the bounce:speed ratio can be as low as 0.4 on some courts and (c) the normal reaction force acts through a point ahead of the centre of mass. An interesting consequence is that, if court A is faster than court B at low angles of incidence, then A is not necessarily faster than B at high angles of incidence. An exception is a clay court which remains slow at all angles of incidence. The measurements also show that the coefficient of restitution for a tennis ball can be as high as 0.9 for an oblique bounce on a slow court, meaning that the ball bounces like a superball in the vertical direction and that slow courts are fast in the vertical direction.     

Morphology of the deltoid muscles in elite tennis players

The aim of this study was to examine the deltoid muscle properties of the dominant and non-dominant arm of Greek professional male tennis players. Eight male tennis players (mean age 22.0 years, s = 3.2) were subjected to biopsy of the deltoid muscle of both arms. Adenosine triphosphate (ATPase) histochemistry and myosin heavy chain (MHC) composition were performed on the samples with homogenate electrophoresis. No significant differences were observed in the percentage of types I, IIa, IIab, and IIb muscle fibres between the deltoid muscles of the two arms. Types I, IIa, and IIx muscle fibres of the dominant and non-dominant deltoid muscles did not differ significantly for MHC isoform composition. Type IIab muscle fibres showed a similar cross-sectional area (CSA) percentage distribution between the two arms. The CSA percentage for types I, IIa, and IIb muscle fibers did not differ significantly between the dominant and the non-dominant arm. We conclude therefore that regular tennis training probably does not lead to any significant changes in the muscle fibre types of the dominant and non-dominant arms of elite tennis players.     

Morphology of the deltoid muscles in elite tennis players

Abstract

The aim of this study was to examine the deltoid muscle properties of the dominant and non-dominant arm of Greek professional male tennis players. Eight male tennis players (mean age 22.0 years, s = 3.2) were subjected to biopsy of the deltoid muscle of both arms. Adenosine triphosphate (ATPase) histochemistry and myosin heavy chain (MHC) composition were performed on the samples with homogenate electrophoresis. No significant differences were observed in the percentage of types I, IIa, IIab, and IIb muscle fibres between the deltoid muscles of the two arms. Types I, IIa, and IIx muscle fibres of the dominant and non-dominant deltoid muscles did not differ significantly for MHC isoform composition. Type IIab muscle fibres showed a similar cross-sectional area (CSA) percentage distribution between the two arms. The CSA percentage for types I, IIa, and IIb muscle fibers did not differ significantly between the dominant and the non-dominant arm. We conclude therefore that regular tennis training probably does not lead to any significant changes in the muscle fibre types of the dominant and non-dominant arms of elite tennis players.     

我国优秀男子网球运动员培育研究

采用文献资料、调查等方法,分析了我国男子网球运动员培养现状,指出影响我国男子网球发展的因素主要有教练员数量少、质量较差;比赛缺乏渐进性、合理性;选材途径狭窄,后备人才缺乏"杀伤力";后备人才缺乏文化和社会的熏陶.提出我国优秀男子网球选手的培育思路是拓展选材途径:应吸收其他项目的优秀人才;制定和实施潜力评估体制和长期系统计划,男子职业化同国际接轨,帮助青少年更快成长;提高教练的业务素质和理论水平,注重运动员文化素养的提高.     

对世界乒乓球运动发展的思考

解决当前世界乒乓球运动发展不平衡、乒乓球人口锐减、比赛观赏差等重大问题.关键是需要国际乒联改变原有的思维方式和观念,变"限制中国"为"世界学中国",并密切与中国合作,尽快地实施在中国建立世界乒乓球学校计划,充分发挥中国在世界乒乓球运动发展中的重要作用.与此同时,国际乒联应站在世界乒乓球战略发展的高度,去审视过去乒乓球赛制、规则、器材等方面改革的得与失,以科学务实的态度进行创新.     

世界优秀空手道运动员技战术特点研究

采用文献资料、录像观察和数理统计等方法,对世界优秀空手道运动员的技战术特点进行分析。结果表明：运动员更偏重使用拳法技术,拳法是运动员主要得分手段;在拳法技术中,运动员的后手拳法最为重要;在腿法技术中,中段回旋踢技术使用次数最多,但是成功率相对偏低,上段回旋踢技术成功率相对较高;在比赛中摔法使用次数较少,成功率相对偏低;在战术分析方面,直攻战术是运动员的主要战术形式。     

我国优秀女子网球运动员体能现状分析及对策研究

运用文献资料、临场测量、数理统计和比较分析等方法,对我国优秀女子网球运动员的体能现状进行研究,找出女网运动员在身体形态、身体机能和身体素质中的不足与差距,探讨我国网球体能训练存在的主要问题,提出优秀女子网球运动员体能训练的发展对策,为提高我国女网运动员竞技能力和运动员选材提供参考.     

Differences in ball speed and accuracy of tennis groundstrokes between elite and high-performance players

Abstract

The main aim of this study was to identify and compare ball speed and hitting accuracy of forehand and backhand groundstrokes between ATP professionals (elite) and high-performance youth players when shots were played cross-court and down the line to a target square. Six elite and seven high-performance tennis players volunteered to participate in the study. A Doppler-radar device and a digital video camera, operating at 120 frames per second, were used to measure ball speed and accuracy of forehand and backhand groundstrokes in the respective situation (cross-court and down the line). The results of 1040 measured groundstrokes indicate that the ball speed of the forehand and the backhand ground stroke was higher in the elite group when analysing (1) all valid shots, (2) the six fastest shots, and (3) the six most accurate shots (all P < 0.05). In addition, all players achieved a higher forehand speed compared with their backhand when balls were directed cross-court (P < 0.01). The participants demonstrated similar ability when considering accuracy of their groundstrokes (P > 0.05). However, a group difference for accuracy was identified when considering the six fastest forehand shots (P<0.05), and the forehand cross-court stroke was played more accurately than the backhand cross-court stroke by both groups (valid shots and six most accurate shots, P<0.05). Moreover, there was no evidence that players who impacted the ball faster were any less accurate than those who impacted the ball more slowly. Analyses for participants actually revealed a negative correlation between ball speed and mean radial error (accuracy) for the backhand down the line (r= ? 0.77, P<0.01). According to the results of this study, ball speed seems to be the determining factor that separates elite from sub-elite tennis players.