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1.
腿击法是警察擒拿格斗技术的一个重要技法,在实战中具有较强的威力。腿法在实战中的运用有主动进攻、防中带攻和防守反击。训练的方法有技术训练、相关身体素质训练、技战术配合训练和心理训练。 相似文献
2.
青少年学生阳光体育活动中引入毽球运动的可行性分析 总被引：3，自引：1，他引：2
毽球运动是一项优秀的民族传统体育项目,在增进青少年身心健康方面应该发挥应有的作用。文章运用文献资料、专家访谈、逻辑分析等研究方法,论证了青少年阳光体育活动中开展毽球运动的可行性和必要性。研究结果显示,毽球运动是十分适合于青少年运动的体育项目,在青少年阳光体育活动中应大力推广。 相似文献
3.
白鳍豚是我国长江流域特有的珍稀动物。在过去的几十年里,白鳍豚的数量在急剧减少,目前已经濒临灭绝。本文试从生物学的角度,探讨其Meta种群灭绝的原因和现有保护措施存在的问题,并提出了在长江中、下游大回水区建立自然保护区网的设想。 相似文献
4.
In this review, we explore the role of motor control and biomechanics in developing an understanding of soccer skills using kicking as the main vehicle. The links between these sub-disciplines of sport science have not been well established in the past because of an emphasis on cognitive processes in traditional accounts of motor behaviour. We argue that a dynamical systems interpretation of the processes of coordination and control in movements with multiple degrees of freedom signals a new era in the relationship between the sub-disciplines of motor control and biomechanics. Although research on coordination and control of soccer skills is currently sparse, there are indications that the relationship between motor control and biomechanics could form a significant component of scientific programmes in talent identification and skill development. Further interdisciplinary work is needed to enhance understanding of coordination and control of soccer skills. 相似文献
5.
毽球作为一种民族传统体育项目,是一项对性别、年龄、场地、器材条件要求较低,技术难度较小,运动强度不大,并且具有健身性、观赏性、趣味性和广泛适应性的大众健身体育项目,深受大学生的喜爱,在高等院校体育教育中大力普及推广毽球运动,会受到广大同学们的重视。毽球运动的发展促进社会的稳定、促进人的身心健康,更有效的促进学校的发展,对更好地推进全民健身计划的实施起到举足轻重的意义。文章通过对大学生毽球运动开展情况进行研究分析,并且对其在全民健身活动开展中存在的问题和发展对策提出自己的建议。 相似文献
6.
Adrian Lees Nader Rahnama 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):283-292
The purpose of this paper was to establish the variability and typical error of kinematic and kinetic variables representing the maximal instep kick in soccer for both the kicking and support legs. Ten skilled (good amateur or semi-professional) soccer players performed 20 maximal instep kicks of a stationary ball into a goal mouth. Motion of the kicking and support legs was recorded by an optoelectronic motion analysis system, and a six degrees of freedom model was used to compute kinematic and kinetic variables. Participants repeated the kicks on a second day at least 1 week later. The mean within-subject coefficient of variation across the kinematic and kinetic variables, trials, and days was 16% and did not change substantially as trial number increased or between day of test. Increasing trial number reduced the typical error (as determined by the standard error of the mean) such that for 20 trials 75% of the variables were below an arbitrary 5% threshold. It was concluded that for kicking investigations, 10–15 trials could be used and typical errors of 5% should be expected. 相似文献
7.
H.C. Dörge T. Bull Andersen H. SØrensen E.B. Simonsen 《Journal of sports sciences》2013,31(4):293-299
The aims of this study were to examine the release speed of the ball in maximal instep kicking with the preferred and the non-preferred leg and to relate ball speed to biomechanical differences observed during the kicking action. Seven skilled soccer players performed maximal speed place kicks with the preferred and the nonpreferred leg; their movements were filmed at 400 Hz. The inter-segmental kinematics and kinetics were derived. A coefficient of restitution between the foot and the ball was calculated and rate of force development in the hip flexors and the knee extensors was measured using a Kin-Com dynamometer. Higher ball speeds were achieved with the preferred leg as a result of the higher foot speed and coefficient of restitution at the time of impact compared with the non-preferred leg. These higher foot speeds were caused by a greater amount of work on the shank originating from the angular velocity of the thigh. No differences were found in muscle moments or rate of force development. We conclude that the difference in maximal ball speed between the preferred and the non-preferred leg is caused by a better inter-segmental motion pattern and a transfer of velocity from the foot to the ball when kicking with the preferred leg. 相似文献
8.
近年蝶泳正朝着加快频率、减少阻力的技术方向发展,特别是以潘克拉托夫为代表的出发、转身后采用海豚式打腿的技术,打破了保持长达八年的男子100米蝶泳纪录,证明这一技术的成熟与合理。本文以一些优秀蝶泳运动员的技术特点为研究对象,用比较、分析的方法,探求近年蝶泳技术的发展特点,供广大教动员参考。 相似文献
9.
近年蝶泳正朝着加快频率、减少阻力的技术方向发展,特别是以潘克拉托夫为代表的出发、转身后采用海豚式打腿的技术,打破了保持长达八年的男子100米蝶泳纪录,证明这一技术的成熟与合理。本文以一些优秀蝶泳运动员的技术特点为研究对象,用比较、分析的方法,探求近年蝶泳技术的发展特点,供广大教动员参考。 相似文献
10.
In the collision between a striking implement and ball, the term “sweet spot” represents the impact location producing best results. In football kicking, it is not known if a sweet spot exists on the foot because no method to measure impact location in three-dimensional space exists. Therefore, the aims were: (1) develop a method to measure impact location on the foot in three-dimensional space; (2) determine if players impacted the ball with a particular location; (3) determine the relationship between impact location with kick performance; (4) discuss if a sweet spot exists on the foot. An intra-individual analysis was performed on foot-ball impact characteristics of ten players performing 30 Australian football drop punt kicks toward a target. (1) A method to measure impact location was developed and validated. (2) The impact locations were normally distributed, evidenced by non-significant results of the Shapiro-Wilk test (p > 0.05) and inspection of histograms, meaning players targeted a location on their foot. (3) Impact location influenced foot-ball energy transfer, ball flight trajectory and ankle plantar/dorsal flexion. (4) These results indicate a sweet spot exists on the foot for the Australian football drop punt kick. In conclusion, the impact location is an important impact characteristic. 相似文献