共查询到19条相似文献，搜索用时 78 毫秒
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有发球必有落点,这是客观存在的事实。通过比赛如能将大量的发球落点统计在案,分区汇集,加以综合,然后再查明比赛中发球落点在球场的具体分布情况,这对寻找发球落点的一般规律,进一步认识发球,指导一传垫击都同样具有意义。 相似文献
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对当今男子网球双打比赛一分球的过程进行分析,认为在男子双打中发球上网几乎是所有选手在比赛中应用的战术,男子双打多场比赛主要集中再前五拍,发球方通过对一发二发的调整,以及接发过程都反应了男子选手在比赛中不仅要保证发球的质量、落点,还要注意提高击球的落点、线路等。 相似文献
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唐芳武 《体育科技文献通报》2013,21(1):53-55
采用录像统计方法,对当今世界优秀男子乒乓球运动员在比赛中的发球落点进行量化研究,分析运动员在比赛中发球落点的技战术运用特点和规律.结果显示:优秀男子乒乓球运动员在比赛中发球落点最多的区域是中间位近网区,占38.93％;发球得分率最高的落点区域是中间位底线区,得分率为63.01％.中间位短球和底线区长球相结合的发球战术是优秀乒乓球运动员运用最有效的战术套路. 相似文献
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第九届全运会女排决赛发球类型及效果的研究 总被引：1，自引：0，他引：1
通过现场对九运会女排比赛发球类型、区域、位距、落点和效果进行统计分析 ,结果表明 :国内女排发球类型呈多样化和相对集中的趋势 ,跳发球运用比例上升 ;发球效果一般 ;发球区和位距选择战术意识有所加强 ;发球落点较集中 ,表明落点技战术运用不够合理 相似文献
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论文运用文献资料法、录像观察统计法、比较分析法等研究方法对8名世界优秀男子网球选手在2011年和2010年澳大利亚网球公开赛以及2010年美国网球公开赛中的20场比赛的ACE球出现率和发球直接得分率与发球落点的关系进行分析,找出世界男子职业网球选手硬地比赛中发球直接得分率与发球落点的关系特征。 相似文献
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通过对我国选手郑洁2008年温网全程比赛的录像观摩,对其发球技术从身高体重、发球落点区域分布、发球球速、ACES和双误、发球成功率、发球得分率等方面与其他优秀选手进行对比分析,得出结论:郑洁的发球比较稳定,但在速度、力量方面与世界优秀女子选手存在较大差距;发球是其技术较薄弱的环节.建议从加强速度力量素质的训练、提高发球技术和完善发球技术动作、增加发球落点变化三方面弥补身高、体重带来的劣势. 相似文献
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通过对第十一届全运会女子排球前八名队伍的12场比赛进行录像与统计,对第十一届全运会女子前八名各支队伍的发球形式、发球落点进行统计分析,发现在前八名队伍中大部分球队中使用跳飘球的队员较多,但是所占比例各不相同,在大部分球队中使用上手飘球的也占有一定的比例,不是在球队的数量还是在使用人数上大力跳发球都占有很少的比例,这不仅因为大力跳发球对球员身体素质的要求高,而且失误率较高;在发球落点方面,各队大部分球的落点都集中在后场区,落点过于集中。 相似文献
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关于羽毛球双打发球落点变化及稳定性的技术分析 总被引：1，自引：0，他引：1
在羽毛球双打比赛中发球点有相当重要的位置。规则规定没有发球权就没有得分。发球质量的好坏决定着比赛的胜负。而发球落点的变化性是高水平双打选手发球技术的重要标志。 相似文献
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随着现代网球运动的发展,网球比赛中发球局是重要的环节之一.因此,选手们都力图通过各种方法和手段保住自己的发球局并寻找机会破掉对手的发球局来获得比分的优势直至比赛的胜利.费德勒无论在技术、战术,还是心理和体能方面都影响了当今网坛,也加快了推动网球运动前进的步伐,他代表当今网坛最先进的网球技术和最先进的网球战术理念.本文试图通过对费德勒在2010ATP年度总决赛中发球局技战术运用特点的研究. 相似文献
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Shots are an essential part of the language of tennis yet little is known about the distinct types of shots in the professional game. In this study, we build a taxonomy of shots for elite tennis players using tracking data from multiple years of men’s and women’s matches at the Australian Open. Our taxonomy is constructed using model-based multi-stage functional data clustering, an unsupervised machine learning approach. Among 270,023 men’s and 178,136 women’s shots, we found 13 distinct types of serves to both the Ad and Deuce court for male players and 17 and 15 types to the Ad and Deuce for female players. More variety was found among serve returns and rally shots compared to the serve; with less variety on the backhand than forehand. There was also more overlap in the physical characteristics of groundstroke shots between male and female players than on serve. Shot type was strongly associated with winning points and shots in the highest speed and lowest net clearance categories tended to be the most effective. This data-driven dictionary of shots provides a framework for analysis of elite player performance, characterizing playing style, and designing more representative practice. 相似文献
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《European Journal of Sport Science》2013,13(6):462-468
Abstract The probability of winning games of tennis has been modelled in terms of the probability of the server winning an individual point. These models are based on the assumptions of stationarity of the point and interdependence. Stationarity is the assumption that the outcome of tennis points is not influenced by the game score at the beginning of the point. The purpose of the current investigation was to compare the outcomes of tennis points during break points and non-break points using data from 528 men's singles tennis matches from all four Grand Slam tournaments in 2008 and 2009. The retrospective probability of the receiver winning a point was 0.42 ± 0.23 during break points which was significantly greater than the 0.38 ± 0.10 during non-break points (P < 0.001). This, in turn, led to players creating significantly more break points than expected (P < 0.001) and breaking serve more frequently than expected (P < 0.001) for the points won when receiving serve. This is evidence that stationarity cannot be assumed and that models of winning tennis games may need to be enhanced to address improved receiver performance during break points. 相似文献
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研究目的：随着网球技术高度发展,要求运动员的各项技术更加全面,就发球而言,目前世界高水平男子单打选手在发球落点、旋转和角度准确性的控制等方面较为突出,而在发球决胜局中,特别是在制胜分上在第一次发失误的情况下,如何在第二发中限制对手并迫使对手进入自己的预设的赢球模式显得尤为重要。研究结果和结论：通过分析发现职业网球选手在处理关键分上发球时偏向采用侧旋,以角度、旋转制胜而不是在速度上寻求制胜。 相似文献
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运用文献资料法、录像分析法、数理统计法等方法,对第十二届男排世界杯得分最多的球员在比赛中发球、接发球、拦网、扣球等方面的数据进行分析,得出如下结论:(1)本届男排世界杯得分最多队员的各种基本情况;(2)跳发大力球是得分最多队员的主要发球方式;(3)绝大部分接应二传放下接发球任务,且大部分是本队的得分最多队员。本文对各种数据的分析希望能为以后得分最多的男排队员的选材、发球,扣球及拦网技术的训练、比赛过程中各种技术数据的统计分析以及排球运动员的管理提供参考。 相似文献
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Ricardo Ferraz Bruno Gonçalves Roland Van Den Tillaar Sergio Jiménez Sáiz Jaime Sampaio Mário C. Marques 《Journal of sports sciences》2018,36(1):116-122
The aim of this study was to identify the influence of prior knowledge of exercise duration on players’ pacing patterns during soccer small-sided games. Twenty semi-professional male soccer players participated in this study. In the first game scenario, players were not informed how long they would be required to play the small-sided game and the activity was terminated after 20 min (Unknown Condition). In the second game scenario, players were told that they would play the small-sided game for 10 min, but immediately after completing the 10-min game, they were asked to complete another 10 min (Partially Condition). In the third game scenario, players were instructed that they would play the small-sided game for 20 min and then they completed the 20-min game (Known Condition). The results presented a tendency of higher values in all performance variables in the [0′–10′] min compared with the [10′–20′] min. As the players’ previous knowledge about the tasks duration increased, the performance between two moments tended to be similar. Considering the entire 20-min game duration, the Partially Condition of the exercise was the most demanding condition. In conclusion, the knowledge of shorter durations of the exercise seems to lead to an increase of exercise duration demand, and longer exercise durations possibly tend to decrease differences between full knowledge and not knowing the exercise duration. 相似文献
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目的：考虑比赛中断因素影响的情况下，探讨我国职业足球运动员比赛结束时段跑动能力是否下降。方法：基于STATS Pro R计算机视频跟踪系统采集的275名职业足球运动员3 438组比赛跑动数据，围绕足球比赛间歇性特征，同时考虑中断时间动态特征和比分差距大小对跑动表现的影响。运用数据级数推断分别界定我国职业足球运动员半场结束时段和比赛结束时段的跑动能力是否下降。研究发现：(1)相较比赛开始阶段，比赛结束时段的中断时间呈现清晰的增加，比分均衡比赛结束时段的中断时间增加更为明显；(2)我国职业足球运动员比赛结束时段总跑动距离呈现清晰的下降(ES=0.31~0.56)，但该下降以中、低速跑动距离为主，所有位置运动员冲刺跑动距离均只出现微小无意义变化(ES=0.14~0.08)；(3)上半场中、低速跑动距离下降程度大于下半场，高强度跑动距离的下降程度小于下半场；(4)比赛结束时段跑动表现变化的位置特征表现为，中后场运动员高强度跑动距离未发生有意义变化，前场运动员高速跑动距离则呈现清晰的减少(ES=0.25~0.37)。结果表明：考虑比赛中断因素影响后，我国职业足球运动员比赛结束时段高强度跑动距离总体未呈现下降趋势；中后场运动员高速跑动距离和冲刺跑动距离均只出现了微小无意义变化，而前场运动员的高速跑动距离则呈现清晰的减少。 相似文献
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Ice hockey is the fastest team game played and is also considered to be one of the roughest of all sports, with a high injury incidence. Injuries and their causes were recorded by the questioning of players in the first league of the Federal Republic of Germany. Eighty-eight out of a total of 207 first league players were included in this study. Head injuries were found to occur most frequently: however, lesions of the shoulders and of the upper and lower extremities had a more detrimental effect. The links between causes and mechanisms of the different kinds of injuries make it clear that a marked tightening of the rules and an improvement in protective clothing would serve to reduce the incidence of injuries in ice hockey. 相似文献