共查询到20条相似文献，搜索用时 78 毫秒
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纵观国内外赛场,优秀的运动员除了有娴熟的技术之外,大都有自己的“绝招”。尤其一些选手强有力的重拳或重腿,不仅给对手心理上以很大的威慑,也往往成为他们克敌制胜的“杀手锏”。是的,赛场便是缩小了的战场。不失时机的一记重击,即使不能令对方倒下,也能大大削弱其“战斗力”。从而为彻底战胜对手奠定一个良好的基础。“重击”也正得到更多的教练员、运动员的关注和青睐。下面我们不妨从动力学的角度来探讨一下“打击力”。 “合外力对物体(或物体系)的冲量等于物体(或物体系)动量的变 相似文献
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为了解决“学生喜欢武术，却不喜欢武术课”的问题，化解学校武术发展的困局，针对武术教学内容进行深入分析，并提出见解。得出：“回归技击，弘扬文化”已成武术教学改革的共识，但存在“打练并进”和“打练结合”的学校武术发展模式之辩，出现了“淡化”“优化”“强化”武术套路的教学定位之争。认为：（1）“打练并进”符合未来学校武术发展的方向，“打练结合”可以改变武术套路教学的枯燥性；（2）将武术散打引入教学体系，实现“武术套路与武术散打”共存的教学模式，才可以实现“武术技击价值”的真正回归；（3）武术“技击性”教学需要充分保障其开展的“安全性”，应依据“禁止重击”的理念进行技术修订。 相似文献
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2020年的“国际妇女节”这一天,中国女子拳手张伟丽于美国拉斯维力n的T.Mobile竞技场,在UFC 248联合主赛中,共计五个回合击败了“异形女王”乔安娜,首次卫冕草量级世界冠军金腰带成功。这场比赛不仅巩固了张伟丽在草量级的冠军统治地位,还因为25分钟一刻不停的重击,而重新定义了女子综合格斗。 相似文献
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运用录像观察、数理统计、对比分析等方法对2016年巴西里约奥运会十名男子拳击冠军运动员技战术的运用情况进行研究与分析，总结出冠军运动员技战术的运用特征。1、冠军运动员不断使用前手直拳真假虚实进攻，借助假动作引诱对手反击或进攻后进行后摆拳、后直拳迎击或直接重击对手头部；2、前手单拳佯攻后组合拳重击；迎击时以后直拳、后摆拳精准击打对手头部；严密防守后或快速撤防后组合拳重击，并以格挡与后仰防守；3、快速后仰后单拳或组合拳结合反击、格挡防守反击精准、躲闪防守以迎击为主；4、重拳组合迎击以假动作、虚晃、步法、欲攻动作为前提，精准性高；5、犯规技术以头前冲为主且使用次数和种类较少。 相似文献
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１、炮二平工 马８进７ ２、马二进子 车９平８ ３、车一平二 卒７进１ 挺卒活己马制彼马，是一步符合棋理的局部好棋。这一走法早在４０多年前已颇为流行，被视为屏风马方抵御先后中炮的正着。后来随着布局的迅猛发展，后手方又以第三加合走马２进３布成屈头屏风马为正宗。步入上世纪９０年代，先手方“婉约缠绵”的中炮进二兵系列战术和“短路快攻”的边马五七炮布局得以蓬勃发展，一度使屈头屏风马阵势遭受重击，于是“抢挺７卒”战术“临危受命”，再度兴起。它可以避开以上红方的两种布局战术，将局面纳入预定的轨道。 ４、车二进六 …… 相似文献
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通过对2003年第7届全国少数民族传统体育运动会陀螺比赛和2004年全国少数民族传统体育陀螺邀请赛的陀螺比赛得分统计与分析,以及对轻钓和重击两种打法实验结果分析,得出在不同场地和规则的条件下,采用重击打法和轻钓打法的优劣. 相似文献
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明“天启通宝”铸于熹宗天启年间(公元1621—1627年),有小平、折二、折十等。“天启通宝”四字楷书,小平钱除光背外,背有星月及记重、记局、记地等多种文字。笔者藏一枚“天启通宝”光背小平钱。钱径24毫米,穿面径4毫米、背径5．5毫米,厚2．5毫米,重6．7克。黄铜质地,钱体厚重,包浆自然,有流通磨损且边缘受重击变形之痕,是开门的传世品。 相似文献
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In this study, we compared mechanical factors in the reverse and three-inch power punches. Twelve expert male martial artists stood on a force plate, and executed reverse and power punches against a padded target fixed to a wall-mounted force plate. The force plates measured horizontal forces, and subsequently impulses and body centre of mass velocity changes. The motions of four markers attached to the arm were also collected, and were used to compute the horizontal velocities of the knuckle and of the arm centre of mass. The power punch produced smaller velocities immediately before impact than the reverse punch for the whole-body centre of mass (0.14 vs. 0.31 m x s(-1)), for the arm centre of mass (2.86 vs. 4.68 m x s(-1)), and for the knuckle (4.09 vs. 6.43 m x s(-1)). The peak force exerted by the fist was much smaller in the power punch than in the reverse punch (790 vs. 1450 N). However, the linear impulse exerted by the fist during the first 0.20 s of contact was slightly larger in the power punch than in the reverse punch (43.2 vs. 37.7 N x s). The results indicate that the power punch is less potent than the reverse punch, but slightly more effective for throwing the opponent off balance. 相似文献
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J. Keith Gulledge 《Journal of sports sciences》2013,31(2):189-196
Abstract In this study, we compared mechanical factors in the reverse and three-inch power punches. Twelve expert male martial artists stood on a force plate, and executed reverse and power punches against a padded target fixed to a wall-mounted force plate. The force plates measured horizontal forces, and subsequently impulses and body centre of mass velocity changes. The motions of four markers attached to the arm were also collected, and were used to compute the horizontal velocities of the knuckle and of the arm centre of mass. The power punch produced smaller velocities immediately before impact than the reverse punch for the whole-body centre of mass (0.14 vs. 0.31 m · s?1), for the arm centre of mass (2.86 vs. 4.68 m · s?1), and for the knuckle (4.09 vs. 6.43 m · s?1). The peak force exerted by the fist was much smaller in the power punch than in the reverse punch (790 vs. 1450 N). However, the linear impulse exerted by the fist during the first 0.20 s of contact was slightly larger in the power punch than in the reverse punch (43.2 vs. 37.7 N · s). The results indicate that the power punch is less potent than the reverse punch, but slightly more effective for throwing the opponent off balance. 相似文献
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The purpose was to compare rotational and linear head accelerations as a result of taekwondo kicks and punches. Taekwondo athletes executed five repetitions of the turning kick, spinning hook kick, hook punch, straight punch, and jab punch to a Hybrid III Crash Test Dummy head-neck complex. A tri-axial accelerometer and an angular rate sensor were mounted inside the Hybrid III head to measure resultant linear (RLA) and rotational accelerations. The Hybrid III was fixed to a height-adjustable frame and fitted with protective taekwondo headgear. Dummy head height was positioned to each participant’s standing height. Acceleration data were processed in accordance with SAE J211-1.There was no significant multivariate difference in RLA but the effect was not clear. Univariate follow-up analysis showed a significant difference in RLA but the effect was also not clear. There was no difference in rotational acceleration. The highest RLA and rotational acceleration were produced, in order, by the turning kick, hook kick, hook punch, straight punch, and jab. These data are clinically important as they provide a better understanding of the biomechanical injury measures and support for improved headgear testing methodology. 相似文献
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魏巍 《体育科技文献通报》2009,17(3):20-21
通过对武术长拳运动项目物质代谢特点及疲劳产生机理的分析，浅谈长拳运动员的糖和铁元素补充及摄入的基本要求，并对武术长拳运动员的营养补充提出合理性建议。 相似文献
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2010年全国女子拳击锦标赛决赛运动员技术特征分析 总被引：1，自引：0，他引：1
运用现场观察法、统计法、专家访谈法等方法,对参加2010年第三届全国女子拳击锦标赛决赛的20名运动员的技术特征进行分析发现:在日常的训练和比赛中,前直拳技术虽占很大比例,但在比赛中有效得分少;勾拳、摆拳运用较少,旨在为我国女子拳击针对性训练提供科学依据。 相似文献
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Piorkowski BA Lees A Barton GJ 《Sports biomechanics / International Society of Biomechanics in Sports》2011,10(1):1-11
The aim of this study was to determine the influence of punch type (Jab, Cross, Lead Hook and Reverse Hook) and punch modality (Single maximal, 'In-synch' and 'Out of synch' combination) on punch speed and delivery time. Ten competition-standard volunteers performed punches with markers placed on their anatomical landmarks for 3D motion capture with an eight-camera optoelectronic system. Speed and duration between key moments were computed. There were significant differences in contact speed between punch types (F(2,18,84.87) = 105.76, p = 0.001) with Lead and Reverse Hooks developing greater speed than Jab and Cross. There were significant differences in contact speed between punch modalities (F(2,64,102.87) = 23.52, p = 0.001) with the Single maximal (M+/- SD: 9.26 +/- 2.09 m/s) higher than 'Out of synch' (7.49 +/- 2.32 m/s), 'In-synch' left (8.01 +/- 2.35 m/s) or right lead (7.97 +/- 2.53 m/s). Delivery times were significantly lower for Jab and Cross than Hook. Times were significantly lower 'In-synch' than a Single maximal or 'Out of synch' combination mode. It is concluded that a defender may have more evasion-time than previously reported. This research could be of use to performers and coaches when considering training preparations. 相似文献
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Martina Rinaldi Yasmen Nasr Ghada Atef Fabiano Bini Tiwana Varrecchia Carmela Conte 《European Journal of Sport Science》2018,18(6):796-805
The aims of this study were: (i) to determine kinematic, kinetic, and electromyographic characteristics of Junzuki karate punch in professional karate athletes; (ii) to identify biomechanical parameters that correlate with punch force and lead to a higher punching performance; (iii) to verify the presence of muscle co-activation in the upper limb, trunk, and lower limb muscles. Data were collected from nine experienced karatekas from the Accademia Italiana Karate e Arti Marziali during the execution of the specific punch. Mean punch forces (181.2?N) delivered to the target, the range of motion of both right and left knees (1.13 and 0.82?rad) and right elbow (1.49?rad) joints, and the angles at impact (knee: 0.81 and 0.91?rad; elbow: 1.19?rad) in the sagittal plane were computed. Furthermore, the trunk rotational angular acceleration (63.1?rad?s?2), force related to the lower limbs (550.2 and 425.1?N), and co-activation index for the upper limb (36.1% and 34.7%), trunk (24.5% and 16%), and lower limbs (16.0% and 16.1%) muscles were evaluated bilaterally. Significant positive correlations were found between the punch force and both right and left knee flexion at the instant of impact and right and left leg force. Significant negative correlation was found between the punch force and maximum trunk angular acceleration. Significant differences (p?=?.03) in the co-activation index among the upper limb, trunk, and lower limbs muscles highlighted a rostro-caudal gradient on both body sides. This research could be of use to performers and coaches when considering training preparations. 相似文献
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研究目的：对长拳、太极拳冲拳动作进行肌电实验,分析长拳、太极拳完成冲拳动作时所调动的肌肉及其iemg值,得出在研究对象本身无差异情况下,不同拳术冲拳的发力对肌肉的调动情况。研究方法：在肌电实验中,以固定个体为研究对象,通过运用美国noraxon生产的t6无线导遥测肌电对练习长拳、太极拳冲拳时的上下肢肌肉表面肌电特征进行分析。研究结果：长拳冲拳过程中,肌肉活动顺序为腹直肌、三角肌前束、股内侧肌、股直肌、腹外斜肌、股外侧肌、股四头肌、肱三头肌、肱桡肌、竖脊肌;积分肌电显示在长拳冲拳阶段三角肌前束、肱桡肌的积分肌电最高;在整个长拳冲拳过程中,腹外斜肌的肌肉贡献率最大。太极拳冲拳过程中,肌肉活动顺序为肱桡肌、腹外斜肌、股内侧肌、竖脊肌、三角肌前束、腹直肌、股外侧肌、肱三头肌、腹直肌、股四头肌;积分肌电显示在太极拳冲拳阶段肱桡肌、股内侧肌的积分肌电最高;在整个太极拳冲拳过程中,腹内斜肌的机头贡献率最大。研究结论：长拳冲拳过程中,受试者较好完成技术动作,腹直肌首先放电,肌肉力量的发放大部分来源于肱桡肌、三角肌前束和肱三头肌,集中于上肢腰部和手臂。太极拳冲拳过程中,受试者未能掌握技术动作,肌肉发力顺序不符合太极拳冲拳技术要求。 相似文献
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文章运用文献资料法、问卷调查法、逻辑分析法等研究方法,对普通高校散打课程的主要技术内容构建进行了研究。研究表明：散打课程技术内容构建要遵循符合课程目标原则、简洁实用原则、民族性原则和现实性原则。其中,技术内容以＂3拳＂、＂3腿＂、＂3摔＂为主＂：3拳＂即冲拳、贯拳和抄拳＂;3腿＂即鞭腿、蹬腿和踹腿;＂3摔＂即勾踢摔、搂切摔和压腿摔。 相似文献
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运用文献资料、问卷调查、逻辑分析等研究方法,对普通高校散打课程内容构建进行了研究.散打课程内容构建要遵循符合课程目标原则、简洁实用原则、民族性原则和现实性原则,包括理论知识和实践技能两大部分.其中,实践部分以"3拳"、"3腿"、"3摔"为主:"3拳"即冲拳、贯拳和抄拳,"3腿"即鞭腿、蹬腿和踹腿,"3摔"即勾踢摔、搂切摔和压腿摔. 相似文献