不同技术类型背越式跳高摆动动作对起跳效果的影响     

刘英梅  何秋华 《体育学刊》2003,10(5):115-117

通过采用不同研究模型对我国优秀男子不同技术类型背越式跳高运动员在起跳时摆动动作效果进行定量分析，探讨我国优秀男子不同技术类型背越式跳高运动员摆动动作对起跳效果的影响。结果表明：我国优秀男子背越式跳高运动员摆动效果约占50％，且摆动效果的大小与技术类型无关，与高度的增加没有线性相关。但当高度增加到本人最好成绩时，摆动作用达到最大值。选用中国男性青年模型与扎齐奥尔斯基模型对背越式跳高技术进行研究，结果没有显差异性。  相似文献   

双杠支撑摆动“钟摆式”保护方法探讨     

陆跃琴  林小美  范启龙 《浙江体育科学》2003,25(4):58-59,64

运用常规保护法与“钟摆式”保护法等两种不同的方法，对双杠支撑摆动技术进行了研究和实践探索。实践表明：双杠支撑摆动的教学，教练员运用双手同时扶持运动员的躯干定点部位进行保护的方法(“钟摆式”保护法)，有助于运动员在短时间内掌握并提高双杠支撑摆动的技术。  相似文献   

论背越式跳高摆动腿动作的技术原理   总被引：1，自引：0，他引：1  

罗跃兵  赵凤英  谭元发  洪元舟 《武汉体育学院学报》2002,36(1):74-75

依据背越式跳高技术的动作方法，运用运动生物力学的基本理论，从运动学和动力学的角度，对背越式跳高技术中，摆动腿在起跳阶段的3个不同时段内的技术原理进行了分析与讨论。  相似文献   

中外优秀女子竞走运动员技术参数对比分析   总被引：4，自引：0，他引：4  

李泽龙  王希柳 《军事体育进修学院学报》2005,24(4):67-69

通过对竞走复步的分析,发现中外优秀女子运动员在后摆、前摆、前支撑、后支撑等阶段中的运动学参数存在一定差异,从中发现我国运动员在技术方面存在的不足,学习国外运动员的长处,有利于提高和完善我国女子竞走运动员技术。  相似文献   

俄罗斯摇摆式教育改革模式探析     

李雅君 《外国教育研究》2011,(8)

探寻俄罗斯教育的发展轨迹,可以清楚地发现俄罗斯摇摆式教育改革模式的突出特点。沙皇俄国时代的教育改革路线是从东方到西方;苏联时期的教育改革路线是反西化;俄罗斯的教育改革路线是西方取向的俄罗斯化。产生摇摆式教育改革模式的根本原因在于俄罗斯好走极端的民族性和文化归属上的双重性。  相似文献   

The influence of moment of inertia on baseball/softball bat swing speed   总被引：1，自引：1，他引：0  

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   

我国女子撑竿跳高技术的运动学分析   总被引：1，自引：0，他引：1  

杨世木  吴玉钦  赖国华 《广州体育学院学报》1998,(2)

采用高速摄影与影片解析的方法,对参加１９９６年全国田径锦标赛的６名优秀女子撑竿跳高运动员的技术进行测试,用握杆高度、人体质心速度变化和转动惯量等指标来揭示人—杆系统的运动学规律及其特征。结果表明,孙彩云的“低髋摆体”技术较先进。  相似文献   

扭转秋千测定Ⅰ的等时性分析及弹性扭转秋千的设计构想     

柳方祥  张连东 《天津体育学院学报》1998,13(4):32-35

扭转秋千测定人体转动惯量的关键在于是否具有谐振系统的等时性。受惠更斯设计不等长摆时钟的启发,经过数学的推演和力学的论证,提出可变臂长弹性扭转秋千的设计构想,并对等时性成立的最适扭转角作了详细的估算  相似文献   

排球直线扣球动作的肌肉工作原理   总被引：2，自引：0，他引：2  

党立英  金鑫  王娟  李玉瑜 《山东体育学院学报》1997,(1)

利用肌电图仪对男子直线扣球的高举式和抡臂式两种姿势进行了测试，通过被测试肌群的运动解剖学和运动生物力学的分析，找出它们之间的特征和规律，以探求最合理的扣球动作，为教学与训练提供理论依据  相似文献   

Correlation between maximum in-shoe plantar pressures and clubhead speed in amateur golfers     

Todd Colin Pataky 《Journal of sports sciences》2015,33(2):192-197

Disagreements exist in the literature regarding the manner in which weight should be dynamically shared during the golf swing, both within-feet and between the back- and target-foot, to generate maximal clubhead speed. The purpose of this study was to determine whether preferential foot-loading locations underlie weight sharing by examining the correlation between clubhead speed and maximum plantar pressure (PP) distributions. Thirty-two amateur golfers with handicap indexes ranging from 2.7 to 25 performed 10 driver swings on artificial turf following a warm-up. PP distributions were recorded at 100 Hz, and clubhead speed was recorded using a ball-tracking Doppler radar system. Maximum PPs were extracted from a 2-s window approximately centred on ball contact and were regressed against clubhead speed. Significance was assessed over the entire foot surface using statistical parametric mapping (SPM), a spatially continuous technique. SPM revealed, at relatively high anatomical resolution, significant positive correlations between clubhead speed and PPs in the lateral target-foot (P < 0.05). This suggests that not only weight transfer but also weight-transfer location may be an important determinant of clubhead speed in amateur golfers.  相似文献