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这期我们介绍马林第三板反拉技术。直板和横板的反拉技术在基本原理上是一样的。 马林发强烈的下旋球到金泽洙的反手位（图一至三）,金泽洙接发球时用侧身拉高吊弧圈（图四至八）,马林判断对方会拉高吊弧圈至自己的反手位,于是,在第三板的处理上果断侧身反拉到对方的反手位（图九至十二）。 在这个实例中,金泽洙为了“安全”起见,拉了一板高吊弧圈,而马林则准备得比较充分,一在用正手反拉的同时,落点尽量控制在对方意想不到的地方。对方侧身拉高吊弧圈后,通常正手位是空档,这时应该打对方的正手位。当对方注意正手位时,就会提前… 相似文献
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郗恩庭说步法（下） 总被引：1，自引：0，他引：1
●直板与横板在步法训练上的侧重点有什么不同? 直板侧身多,主要练左右步法、近台的步法。步法不是绝对的,有的人学不好并步,加—个小碎步,像邓亚萍那种,也挺好,你还不容易看出来。横板选手,如果反手弧圈相当强,那肯定是交叉步多,但还是要分情况,视来球而定。有的来球角度不大,就用并步(跳步)上去冲;如果角度大,你用交叉步赶过去,也得交叉回来,否则距离太远回不来。欧洲人力量大、个子大,在多个击球点上都能发出很大的力来,而中国人就必须抢高点。像王涛,不也是并步吗?他用不上多少交叉步,有时候真交叉过去扑完正手,再反交叉回来,就只能改削了,他反面是生胶,回来能削就不错了,这也是一种方法。像郭跃华,就是并步加交叉,一跑交叉两脚就到,但是有时候回不来了,又不会反手拉,就 相似文献
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反手发强下旋至A的反手底线,此球尽量长,配合转不转短球至A的反手不出台。A搓回后(通常到我方反手位),侧身抢拉。我方发球后应注意侧身步法不要过于前插,以免A搓的长球把自己顶住,令我方无法出手。发球后抢拉的这一板无需太转,由于A搓的球速度可能较快,我方要把弧圈拉得很转有相当难度,故而以速度、落点为主,力量上以借力为主,击球时间不可太晚(避免侧身位置太靠后,结 相似文献
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接发球后第４板的反拉要点： １．接下施发球时迎前快搓,搓球要加力控制,提高质量,迫使对方只能拉高吊弧圈球。高吊孤圈球进行反拉反剃,如对方快拉则可挡一板过渡。 ２．步法尽量到位,反拉对方的高吊孤圈球时,击球点应该是球的上升期。 ３．反拉不能光用手臂,同时还要用腰和身体的力量。对弧线短的球,步法要到位后再打,并注意身体用力要一致。图片说明 瓦尔德内尔发强烈的下旋球至马林的反手位,马林接发球时用正手摆短的击球时间快搓至瓦尔德内尔的反手底线,瓦尔德内尔用反手拉高吊弧圈球至马林中右位置,被马林反拉正手空当。 … 相似文献
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蒋澎龙侧身拉后转推挡 总被引：2，自引：0，他引：2
A组图中的蒋澎龙侧身拉后转推挡,是直板拉推结合型打法非常有代表性的技术环节。对于直板单面拉选手而言,在侧身上手时.下一板的第一选择常常是准备以较大范围的移动。进行正手连续拉.侧身后的还原动作较小.身体重心也多放在正手进攻上。而对于直板拉推结合型打法的选手来讲.情况则有所不同。大家不妨与B组图中蒋澎龙推挡后接侧身抢拉的动作相比照.揣摩其中身体重心转换和还原方式上的差异。 相似文献
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52j_本组图片取自马林与希腊名将格林卡的对局,全过程由四个部分组成jj马林发哦i格林卡接发球(图1_5);马林反面抢攻、格林卡第四板招架(图一6—8)i马林侧身大力冲杀斜线I图g-:il分)∥马林准备连续进攻,～但格林卡回球已出界0图14—16 h i。。 , …一 。r-…。这是现代直板反胶进攻型打法在自己发球轮典型的抢攻套路孑 j÷ 一, · 。 一马林发球后反手抢攻结合侧身杀板@李晓东 相似文献
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This study examined the effect of carbohydrate ingestion on metabolic and performance-related responses during and after a simulated 1h cycling time trial. Eight trained male cyclists (VO 2 peak = 66.5ml kg -1 min -1 ) rode their own bicycles mounted on a windload simulator to imitate real riding conditions. At a self-selected maximal pace, the cyclists performed two 1h rides (separated by 7 days) and were fed either an 8% carbohydrate or placebo solution. The beverages were administered 25 min before (4.5ml kg -1 ) and at the end (4.5ml kg -1 ) of the ride. With carbohydrate feeding, plasma glucose tended (P = 0.21) to rise before the time trial. Compared with rest, the plasma glucose concentration decreased significantly (P < 0.05) at the end of both rides, with no statistically significant difference being observed between treatments. Thereafter, plasma glucose increased significantly (P < 0.05) at 15 and 30 min into recovery, and was significantly higher at 30 min during the carbohydrate trial compared with the placebo trial. No significant changes in plasma free fatty acids were observed during the ride. However, a significant increase (P < 0.05) in free fatty acids was found at 15 and 30 min into recovery, with no difference between trials. Mean power output was significantly (P < 0.05) greater during the carbohydrate compared with the placebo trial (mean - S.E.: 277-3 and 269-3W, respectively). The greater distance covered in the carbohydrate compared with the placebo trial (41.5-1.06 and 41.0–1.06km, respectively; P < 0.05) was equivalent to a 44s improvement. We conclude that pre-exercise carbohydrate ingestion significantly increases endurance performance in trained cyclists during a 1h simulated time trial. Although the mechanism for this enhancement in performance with carbohydrate ingestion cannot be surmised from the present results, it could be related to a higher rate of carbohydrate oxidation, or to favourable effects of carbohydrate ingestion on the central component of fatigue. 相似文献
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Roy J. Shephard 《Journal of sports sciences》2013,31(7):603-620
The biology and medicine of rowing are briefly reviewed. Effort in a 2000 -m race is about 70% aerobic. Because the boat (and in some instances a cox) must be propelled, successful competitors are very tall, with a large lean mass and aerobic power. Large hearts may lead to erroneous diagnoses of a cardiomyopathy. Large respiratory minute volumes must be developed by chest muscles that are also involved in rowing. The vital capacity is typically large, and breathing becomes entrained. Expiration cannot be slowed relative to inspiration (as normally occurs at high rates of ventilation) and the limiting flow velocity may be reached, with the potential for airway collapse. Performance is strongly related to the power output at the ‘anaerobic threshold’, and lactate measures provide a guide to an appropriate intensity of endurance training. Peak blood lactate levels are higher in males (commonly 11–19 mmol·l -1 and occasionally as high as 25 mmol·l -1) than in females (9–11 mmol·l -1), probably because males have a greater muscle mass in relation to blood volume. The skeletal muscles are predominantly slow twitch in type, developing an unusual force and power at low contraction velocities. Many rowers have a suboptimal diet, eating excessive amounts of fat. Lightweight rowers also have problems of weight cycling. Aerobic power and muscle endurance often change by 10% over the season, but such fluctuations can be largely avoided by a well-designed winter training programme. Injuries include back and knee problems, tenosynovitis of the wrist and, since the introduction of large blades, fractures of the costae. 相似文献
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许良 《体育科技文献通报》2011,19(2):1-4
基于1985、1995和2005年全国学生体质调研数据,对各时期我国城乡学生形态、机能、体能发展水平进行系统地定量研究,动态分析20年全国城乡学生体质发展的特点与规律。主要研究结果：（1）近20年城乡学生生长发育持续提前,城市学生各项形态指标生长水平高于乡村,身高城乡差距缩小,体重、胸围城乡差距加大;（2）城市学生肺活量水平高于乡村,城乡学生肺活量20年持续下降,前10年乡村学生下降快、后10年城市学生下降快;（3）乡村学生800m、1000m跑水平高于城市,城市女生50m跑、仰卧起坐水平高于乡村,其他素质城乡学生水平波动较大;（4）城市女生50m跑20年持续下降,城乡学生800m和1000m跑、城市学生50m×8往返跑20年加速下降,其他素质20年间有增有降发展极不平稳。 相似文献
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采用测量、问卷调查、数理统计等方法,分析定向运动学习前后对大学生身心健康的影响.结果经T检验和x2检验且表明：定向运动不仅能增强学生体质健康水平,而且有助于学生的情绪调节,增强自信心与创新意识,培养勇敢顽强的意志品质,建立良好的人际关系,能有效地促进学生身心健康发展.为了全面提高大学生整体素质,积极实践,构建定向运动课内外一体化教学模式,进行定向运动课程模块化教学,以满足学生的多元化需求. 相似文献
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Alan M. Nevill Roger L. Holder Andrew Bardsley Helen Calvert Stephen Jones 《Journal of sports sciences》2013,31(4):437-443
A regression analysis of competitors' tournament results in relation to their world rankings was proposed to identify the effect of home advantage in international ‘grand-slam’ tennis and ‘major’ golf tournaments. The results provided little evidence of home advantage in either the grand-slam tennis or the golf tournaments held in 1993. The only possible evidence of home advantage was found in the Wimbledon tennis and the US Open golf championships. Even these findings can be explained, at least partially, by (1) the availability of information concerning the low world rankings of the British tennis players competing at Wimbledon, and (2) selective entry, allowing only the world's top-ranked foreign golfers into the US open golf tournament. In both cases, the lower ranking home competitors have a greater opportunity to perform above their anticipated world rankings. Therefore, provided entry into tennis and golf tournaments is truly ‘open’ to both the host nation's representatives and foreign competitors alike, home advantage does not appear to be a major factor influencing the competitors' performance in such competitions. These findings may be explained by the relatively objective nature of the scoring systems used in tennis and golf, unlike the subjective influence of refereeing decisions on the results of team-games such as soccer. 相似文献
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曲爱宁 《体育科技文献通报》2007,15(8):97-98
柔韧素质是健美操专业学生的专项素质之一,通过对普通高校健美操专业学生分组对照进行柔韧性训练的实验研究,认为对训练肌群辅以按摩器振颤刺激,可大大提高柔韧性训练效果。 相似文献
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我国城市体育自然环境建设与发展的研究 总被引：5，自引：0，他引：5
采用实地调查研究、理性思维研究和文献资料调研等方法对主要问题进行了专门研究，提出了进行城市体育场所区域生态功能区划、设计体育生态功能区布局的方案、做好体育场所绿色环境系统规划、制定体育场所生态与绿地管理措施等基本观点，提出了若干城市体育自然环境建设与发展的对策。 相似文献
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重新认识体育的社会关联 总被引：3，自引：1，他引：2
体育与政治之间存在一个悖论，体育的发展与经济实力之间没有直线相关，体育与教育部分重叠，体育与宗教最为近缘，体育可借用科学手段，体育的艺术禀性日益明显，体育与养生反映着两种人生观。 相似文献