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1.
棒、垒球运动员流畅心理状态的主要特征研究 总被引：18，自引：2，他引：16
结合我国运动员运动竞赛的亲身体验，重新翻译和检验《流畅状态量表》。通过对200名棒垒球运动员的调查，结果发现，棒垒球运动员流畅心理状态最主要的四个特征是：挑战一技能平衡、行动一意识融合、高度控制感和自我意识的丧失；运动员流畅心理状态主要特征与比赛成绩高度相关；棒垒球运动员流畅心理状态的结构特点为：流畅心理较低型占总人数的3396，优秀型和良好型共占总人数的6796；棒垒球运动员流畅心理状态具有一定的稳定性，流畅心理状态主要特征中心坐标95％置信区间值可作为运动员流畅心理水平的评价标准。 相似文献
2.
太极柔力球的现状与发展对策 总被引：19，自引：0，他引：19
李恩荆 《北京体育大学学报》2002,25(6):855-856
太极柔力球运动是一改传统硬性击球方式,以弧形引化过程触及球体并顺势将球抛出为主要技术特征的,有鲜明民族特色的新兴体育运动项目.就太极柔力球的发源、发展及运动特点进行了较深入研究,并对发展过程中面临的困难提出了相应对策,为今后更好发展该项目提供参考价值. 相似文献
3.
Keith?KoenigEmail author Nan?Davis?Mitchell Thomas?E.?Hannigan J.?Keith?Clutter 《Sports Engineering》2004,7(2):105-117
The speed at which a player can swing a bat is central to the games of baseball and softball, determining, to a large extent,
the hit speed of the ball. Experimental and analytical studies of bat swing speed were conducted with particular emphasis
on the influence of bat moment of inertia on swing speed. Two distinct sets of experiments measured the swing speed of colege
baseball and fast-pitch softball players using weighted rods and modified bats. The swing targets included flexible targets,
balls on a tee and machine pitched balls. Internal mass alterations provided a range of inertial properties. The average measured
speeds, from 22 to 31 m s−1, are consistent with previous studies. Bat speed approximately correlates with the moment of inertia of the bat about a vertical
axis of rotation through the batter's body, the speed generally decreasing as this moment of inertia increases. The analytical
model assumes pure rotation of the batter/bat system about a vertical axis through the batter's body. Aerodynamic drag of
the batter's arms and the bat is included in the model. The independent variable is bat moment of inertia about the rotation
axis. There is reasonable agreement between the model and the measured speeds. Detailed differences between the two suggest
the importance of additional degrees of freedom in determining swing speed. 相似文献
4.
在垒球教学训练中,对投手采取间隙训练法进行训练,能有效地适应垒球比赛的特点,适应实战的需要,对投手投球训练效果将产生更积极的作用。 相似文献
5.
Describing the plastic deformation of aluminium softball bats 总被引：1，自引：1，他引：0
Hollow aluminium bats were introduced over 30 years ago to provide improved durability over wooden bats. Since their introduction,
however, interest in hollow bats has focused almost exclusively around their hitting performance. The aim of this study was
to take advantage of the progress that has been made in predicting bat performance using finite elements and apply it to describe
bat durability. Accordingly, the plastic deformation from a ball impact of a single-wall aluminum bat was numerically modelled.
The bat deformation from the finite-element analysis was then compared with experiment using a high-speed bat test machine.
The ball was modelled as an isotropic, homogeneous, viscoelastic sphere. The viscoelastic parameters of the ball model were
found from instrumented, high-speed, rigid-wall ball impacts. The rigid-wall ball impacts were modelled numerically and showed
good agreement with the experimentally obtained response. The strain response of the combined bat-ball model was verified
with a strain-gauged bat at intermediate ball impact speeds in the elastic range. The strain response of the bat-ball model
exhibited positive correlation with the experimental measurements. High-speed bat-ball impacts were performed experimentally
and simulated numerically at increasing impact speeds which induced correspondingly increased dent sizes in the bat. The plastic
deformation from the numerical model found good agreement with experiment provided the aluminium work hardening and strain
rate effects were appropriately described. The inclusion of strain rate effects was shown to have a significant effect on
the bat deformations produced in the finite-element simulations. They also helped explain the existence of high bat stresses
found in many performance models. 相似文献
6.
李小妮 《体育科技文献通报》2014,(1):22-23
太极柔力球是一项简单易学,具有观赏性、竞技性、健身娱乐的运动,它具有我国的民族特色,是将太极融入其中的新兴运动项目。本文运用文献资料法,查阅大量有关太极柔力球运动的期刊,研究太极柔力球的起源,运动特征,以及太极柔力球运动对大学生身心健康的影响。结果表明,太极柔力球运动对大学生身体形态、心血管与呼吸系统、身体素质;心理素质、心境方面都有着重要的促进作用。 相似文献
7.
对中国目前国内三位女子优秀垒球投手绕环投球动作进行三维定点拍摄和录像解析.实验结果表明中国优秀投手对整个投球动作的总体掌握较熟悉,动作连贯性较好.其中张艳清伸踏时间、下摆加速时间、伸踏距、肩髋角、肘伸速度、肩旋内速度、球出手速度等运动学指标已达国际一流水平.在出手瞬间人体重心高度、球心高度方面,三位投手没有显著性差异,两指标值说明我国优秀运动员对垒球出手环节技术的掌握已达到国际先进水平. 相似文献
8.
阐述了近年来高校垒球运动的发展现状，并根据高等教育特点进行分析，探索推广普及垒球运动的有效途径．使垒球运动人口得到提高。 相似文献
9.
世界女子垒球八强实力分析 总被引：4，自引：0，他引：4
陈小敏 《广州体育学院学报》2001,21(2):77-80
以参加第27届悉尼奥运会的八支女子垒球队为研究对象，对当前世界女子垒球实力、年龄结构、技术风格与打法类型等进行分析。结果显示：(1)世界女子垒球仍分为两大集团，第二集团队伍与第一集团队伍的总体水平有一定的差距；(2)加拿大、日本、美国、澳大利亚等四支队伍年轻队员多，后备力量充足，而古巴、意大利、新西兰、中国等四支队伍年龄结构不合理，后备力量不足；(3)美国、澳大利亚和中国投手的实力明显高于日本投手的实力，但日本队在进攻和防守上凭借着细腻的技术默契的配合，也能取得比赛的胜利。旨为我国女垒队今后训练与提高，提供理论参考。 相似文献
10.
＂体教结合＂培养高水平运动员已得到全社会广泛关注,高校作为人才培养基地,理应承担起高水平运动员文化教育重任,以满足他们未来可持续发展要求。高水平运动队进入高校,同时给高校注入了体育文化活力,有利于高校协调发展。本文结合以省队校办模式,建设南工大江苏垒球队实践,认为充分体现了体教结合优势,解决了运动员读训矛盾,促进了运动员全面发展;高校通过承办赛事,扩大了对外交流,提升了学校美誉度;有力地推动了校园文化活动。 相似文献