网球运动中底线反拍单手击球动作技术的分析及训练方法

网球选手如果能够熟练地掌握底线反拍单手击球动作，就有可能在比赛中取得优异的成绩。分析了网球运动中底线反拍单手击球动作的握拍方式，击球的种类与要点，关节运动与肌肉的收缩特点，以及训练方法。     

对男子网球单手反拍与双手反拍的技术分析

底线反手技术在网球技术中是十分重要的。网球反手击球有两种方式,一种单手反拍技术(以下简称单反),另一种双手反拍技术(以下简称双反)。大家对两种反拍技术都各持己见,到底哪种技术更为先进更为合理没有科学依据。以前双反技术多出现在女子网坛,但是现在双反技术在男子网坛也颇为盛行,本文以男子网球从单反、双反握拍到击球技术等方面,对两种击球方式进行综合对比分析,指引网球初学者和爱好者结合自身的打法特点选择适合的反拍击球技术。     

谈网球运动的防御性击球

如今，网球运动技术动作中单手反拍削球技术在防守战术中的运用是非常普遍的。时于双手握拍的运动员来说，在防守战术中正确掌握并运用单手反拍削球技术，虽然有悖于传统技术要求．但是，在网球竞技的实践中却具有很强的实用性．此外，在防守位置上与常规不同的正手击球方法也是极其有效的。     

网球、乒乓球

G845.19 20015259网球单、双手反拍击球技术的对比和实际运用=Make acomparison between single and double backhand stokeand its practical application[刊,中,I]/史为临//四川体育科学.-2001(1).-33-35参5(SML)网球//单手//双手//反拍击球//技术分析     

网球双手反拍技术要点分析及训练方法

双手反拍击球是许多网球运动员特剐是女运动员所采用的一项十分重要的技术。通过分析其特点，采取合理而有效的训练方法，可以使运动员正确掌握双手反拍击球的技术动作，为比赛中合理运用这项技术打下坚实的基础。     

双反变化无穷

双手反拍击球技术的演变,很好地增加了反手击球在比赛中的进攻性,同时也提升了网球底线技术的进攻能力,其广泛使用令国际网坛出现了大批的底线全能攻击型选手,也使网球技术水平发展到了一个全新的高度。     

对单手反拍技术在黑龙江省网球运动中运用的研究

本文通过对世界网坛职业运动员,及对黑龙江省第六届高校网球公开赛所有参赛选手的调查,发现单手反拍打法在国际网坛已被越来越多的球员所运用,尤其在男子球员中占据着重要地位,但在黑龙江省却被较少的运用。而网球专业教师中采用单手反拍打法的仅有2人,且专门院校的教学大纲中也无明确学时规定,这都严重的制约了单手反拍技术在黑龙江省的发展。本文针对此现状进行研究得出结论,提出了相应的建议,为提高单手反拍打法在黑龙江省网球界的地位提供了借鉴作用。     

网球运动中最被低估的六种击球

现如今,许多职业选手和业余选手都在使用双手反拍处理反手位的来球。但是,如果你就此自满,不去学习单手反拍技术,则是一个非常大的错误。无论是放小球、切削球、改变击球的节奏或是最基本的跑动中反手位防守型击球,都需要使用单手反拍技术。如果你迫不得已在较晚的击球时机击球,也会用到单手反拍（对于你来说,这样做在后退时击球更为简单）。     

网球反拍教学的影响因素分析——以南阳市普通高校为例

本文采用文献资料法,专家访谈法,问卷调查法以及数理统计法,以河南省南阳市普通高等学校的网球反拍技术教学为例,对其现状进行调查。依据调查结果,发现南阳市普通高校网球反手技术教学的情况：高校进行网球反拍学习时,教师大多推荐学生使用双手反拍技术,教师以及学生中使用单手反拍的学生占极少数,部分使用单手反拍的学生技术动作并不完全规范,多数是依赖自己看视频等方式进行学习。本文对南阳市普通高校网球反拍技术的教学现状进行研究并得到结论,提出相关建议,为进一步丰富南阳市普通高校的网球反拍技术的教学,以及提高网球技术中的单手反拍技术的学习提供一些参考依据和改进方法。     

高校网球教学中单手反拍击球技术运用的调查研究

通过对辽宁省高校任教的网球专业及非网球专业教师的调查,发现单手反拍打法在辽宁省高校网球教学中较少运用,网球专业教师中采用单手反拍打法的仅有几人,且教学大纲中也无明确学时规定,这都严重地制约了单手拍技术在高校的发展。本文针对此现状进行研究,并提出相应的建议,以期为提高单手反拍打法在高校网球教学中的运用提供借鉴。     

Dynamic balance performance varies by position but not by age group in elite Rugby Union players – a normative study

This cohort study aimed to provide normative Y Balance Test scores for an elite Rugby Union population, while investigating the effect player age groups (senior/under-20), playing positions (forwards/backs) and anthropometrics (height and body mass) had on performance. Two-hundred and sixty-one elite male under-20 (n = 50) and senior (n = 211) players completed baseline Y Balance Test during the 2015/2016 season. One-way ANCOVA and post-hoc t-tests were used to investigate the effect playing position, player group, height and weight had on performance. The cohort was then stratified into groups (age group and/or playing position), and normative percentiles were presented. There was a statistically significant difference (p < 0.05) in Y Balance Test performance between playing positions, when controlling for age group. This difference did not remain when controlling for player body mass. Post-hoc analysis demonstrated that backs had a longer normalised reach distance, with medium-large and small-medium effect sizes for the under-20 and senior cohorts respectively. The one-way ANCOVA analysis suggests that this difference is likely due to the larger differences in player body mass between forward and back playing positions. The normative values presented in this paper may be used by clinicians and researchers to aid injury prevention and rehabilitation strategies.     

2011年澳网决赛李娜得失分方式分析

本文采用了三段分析法、录像分析法等研究方法,对我国网球运动员李娜在2011年澳大利亚网球公开赛女子单打决赛中的得失分方式进行分析.结果发现,李娜得分的主要部分在发球战术系统,但与对手相比发球战术的优势不明显,李娜的失分主要发生在底线非受迫性失误.     

A notational analysis of elite tennis strategy

A notational analysis of singles events at all four Grand Slam tournaments between 1997 and 1999 was conducted to determine the influence of the sex of the player and court surface on elite tennis strategy. Rallies of 7.1 +/- 2.0 s in women's singles were significantly longer than those in men's singles (5.2 +/- 1.8 s; P < 0.001). Rallies of 6.3 +/- 1.8 s at the Australian Open, 7.7 +/- 1.7 s at the French Open, 4.3 +/- 1.6 s at Wimbledon and 5.8 +/- 1.9 s at the US Open were recorded. Rallies were significantly longer at the French Open than at any other tournament (P< 0.05) and significantly shorter at Wimbledon than at any other tournament (P< 0.05). In women's singles, 52.8 +/- 12.4% of points were baseline rallies, significantly more than in men's singles (28.6 +/- 19%; P < 0.001). The proportion of baseline rallies played at the French Open (51.9 +/- 14.2% of points) was significantly greater than at the Australian Open (46.6 +/- 12.5%), Wimbledon (19.7 +/- 19.4%) and the US Open (35.4 +/- 19.5%; P < 0.05). The results show that both the sex of the player and surface of the court have a significant influence on the nature of singles tennis at Grand Slam tournaments.     

Dynamics of players’ relative positioning during baseline rallies in tennis

Abstract

This study analysed how the relative positioning of players on court influenced patterns of interpersonal coordination in baseline rallies in tennis. We developed a model (PA index) that assigns a weight to the position of each player on court and determines a positional advantage, based on the relative proportionality between the lateral and longitudinal displacement values during rallies. To test the model, data from 27 randomly-selected baseline rallies from three ATP World Tour matches (professional tennis players' tournaments organized by Association of Tennis Professionals) on clay were analysed. Results revealed that the PA index of players on court described their interpersonal coordination dynamics during baseline rallies. It also identified the emergence of rally breaks in the interpersonal coordination patterns of competing dyads that led to a point being scored. Data suggest that positional advantage data may assist coaches in the design of training tasks to enhance players' court coverage and performance during competitive interactions, acting as a valuable tool for performance analysis in tennis.     

A notational analysis of elite tennis strategy

A notational analysis of singles events at all four Grand Slam tournaments between 1997 and 1999 was conducted to determine the influence of the sex of the player and court surface on elite tennis strategy. Rallies of 7.1 ± 2.0 s in women's singles were significantly longer than those in men's singles (5.2 ± 1.8 s P < 0.001). Rallies of 6.3 ± 1.8 s at the Australian Open, 7.7 ± 1.7 s at the French Open, 4.3 ± 1.6 s at Wimbledon and 5.8 ± 1.9 s at the US Open were recorded. Rallies were significantly longer at the French Open than at any other tournament ( P < 0.05) and significantly shorter at Wimbledon than at any other tournament ( P < 0.05). In women's singles, 52.8 ± 12.4% of points were baseline rallies, significantly more than in men's singles (28.6 ± 19% P < 0.001). The proportion of baseline rallies played at the French Open (51.9 ± 14.2% of points) was significantly greater than at the Australian Open (46.6 ± 12.5%), Wimbledon (19.7 ± 19.4%) and the US Open (35.4 ± 19.5% P < 0.05). The results show that both the sex of the player and surface of the court have a significant influence on the nature of singles tennis at Grand Slam tournaments.     

排球后备人才基地教练员与运动员现状的调查

采用文献资料法、问卷调查法、数理统计法,对全国25所排球后备人才基地排球教练员与运动员现状进行调查分析。结果表明:我国女排后备人才基地教练员群体梯队建设较薄弱、排球后备人才可供成年队挑选的适龄运动员数量偏少、青少年运动员比赛较少、"学训矛盾"仍然存在、后备人才基地经费来源有待进一步拓宽、后备人才基地现有硬件设施基本满足训练需要。     

NBA球员交换的研究

对NBA球员交换的规则、交换条款和交换时限等内容进行论述。立足于NBA球员交换的实践,举例说明,NBA球员交换条款的运用方式、交换条款、工资条款、选秀条款等的确立是NBA处理劳资关系,人才竞用机制良好发展的基础。     

对我国女排优秀“自由人”李颖接上手飘球技术的运动学分析

＂自由人＂又称＂自由防守队员＂,是国际排联为进一步鼓励防守,促进排球比赛的攻守平衡,使比赛更加激烈精彩,提高其观赏性,而于1999年正式实行的新规则。本文主要采用标准的三维摄像DLT法和录像解析法,对2001-2002年全国女排联赛期间,辽宁女排主场决赛期间的八一队＂自由人＂李颖（原国家队＂自由人＂）和天津队＂自由人＂张娜（国家队＂自由人＂）及天津队的李珊（国家队队员）、杨洁接上手发飘球技术进行运动学研究,旨在提示该过程中蕴含的运动学规律,从而为教练员和运动员的训练和比赛提供理论参考依据。     

我国足球运动员力量训练存在问题分析

根据现代足球运动特点，认为力量素质是足球运动员基本素质，分析国外足球运动员力量训练理论实践，对当前国内外足球运动员力量素质的训练现状进行分析，找出我国足球运动员力量训练中存在的问题，提出响应的训练方法和手段，希望能为我国足球运动员力量训练水平的提高有所帮助。     

Efficacy of using non-linear pedagogy to support attacking players’ individual learning objectives in elite-youth football: A randomised cross-over trial

ABSTRACT

The present study examined the efficacy of a coaching curriculum, based on non-linear pedagogy, on improving attacking players’ individual learning objectives (ILOs) in elite-youth football. Participants included 22 attacking players (i.e., centre-forwards, wide-players and attacking midfield players) from a professional football academy in England. The players were randomly appointed to both control (CON) and intervention (INT) periods following baseline measures. The INT (non-linear) and CON (linear) periods were both designed to support the ILOs provided to each player as part of the elite player performance plan. The study adopted a randomised cross-over design and ILOs considered important for attacking players (i.e., strong foot finishing, weak foot finishing, 1-v-1 and decision-making) were evaluated using the Loughborough Shooting Skill Test. The results showed significant differences for INT in 1-v-1 (P< 0.02) and decision-making (P< 0.01). However, there were no significant differences for strong foot finishing, weak foot finishing or time taken. These results support non-linear pedagogy in developing 1-v-1 game play and decision-making but not for technical shooting proficiency.