共查询到20条相似文献，搜索用时 609 毫秒
1.
靳小雨 《体育科技文献通报》2005,13(5)
本研究从抛球精度、助跑速度、起跳角度、挥臂弧度、击球高度、落点难度等6个方面,对优秀男排运动员大力跳发球技术的各环节因素进行分析,以期能够为大力跳发球技术的训练提供一点参考。1.抛球精度:抛好球是发好球的基础,对保证大力跳发球的质量起到至关重要的作用。抛球精度主要涉及抛球手的选择、抛球的旋转、抛球的高度和抛球的距离等问题。(1)抛球手的选择:采用右手发球右手抛,这样做跳发球的节律性更好,因为,右手抛球后事先为右手发球准备了一个摆臂动作,使整个动作有机地连为一体,效果更好。 相似文献
2.
网球发球是运动员唯一由自己掌握而不受对手控制与影响的击球环节。在比赛中,许多优秀的网球运动员巧妙地运用发球来搭配战术抢得先机。本文主要以2018年郑洁杯和2018年尤尼克斯杯男子十二岁组决赛的四名少年网球运动员为研究对象,运用文献资料法、录像观察法以及逻辑分析法这三种研究方法来分析少年网球运动员发球失误技术的特点。通过对这两种比赛的视频进行发球技术数据统计,得出以下结果:在发球总失误中,因为抛球高度不正确导致发球失误占64.03%,其中抛球高度过高占抛球高度不正确的59.57%;发球时没有顶髋导致发球失误在两场比赛中存在45颗,占总发球失误12.26%;发球时动作脱节导致发球失误有57颗,占发球总失误15.53%;发球时握拍偏正手导致发球失误30次,占总失误率8.17%。对上述结果分析得到了以下结论:少年网球运动员在发球技术上的问题常发生于抛球高度位置不合适,会出现抛球偏高偏低或者靠前靠后,发球时顶髋动作缺失,发球的整体动作节奏感混乱,正手击球后的握拍出现发球中。 相似文献
3.
一、排球发展形势及观念对发球的影响纵观排球发展历史,不同历史年代都会有某种发球方式处于主导地位。20世纪50年代主要采用勾手大力发球和正面上手发球;60年代出现了飘球;70年代, 运动员在发球技术运用上有所提高,运动员用相似的动作发出不同性能的球;80年代欧美国家的一些男运动员依据身体条件的优势首先采用跳发球技术;进入90 年代,跳发球技术被普遍采用。 2002年世界女排锦标赛上,中国、俄罗斯、古巴三国使用跳发球的比例达到了60．7％,28．4％,53．7％, 相似文献
4.
从技术和身体条件两方面对我国男排大力跳发球速度的影响因素进行了分析,结果表明:大力跳发球技术的熟练程度与运动员身体的充实度是影响我国男排发球速度的主要因素,并提出了建议:我国男排的发球技术要形成稳定的动力定型;选择行之有效的力量训练方法,增进肌肉体积、提高肌肉力量;配合营养补剂增加运动员的身体充实度。 相似文献
5.
6.
优秀网球运动员发球技术特征分析 总被引：6，自引：0，他引：6
应用计算机技术及CAI软件功能,并结合生物力学原理,研究、解析桑普拉斯和阿加西发球技术的主要特征所在,包括完成发球技术动作的时间特征;抛球与过渡阶段技术环节主要特征;向后、向前挥拍阶段动作技术特征;从理论上和实践中分析其优势特征的合理性、实效性.主要结论:桑普拉斯和阿加西两人发球时,抛球技术动作连贯、稳定、位置准确、抛球落差小、抛球臂肌肉感觉精细,向后、向前挥拍时间短,充分合理地运用了躯干侧弓、背弓、下肢肌群转动用力及上肢挥臂旋内动作,使发球动作过程,肌肉工作群协调有力,从而形成了发球技术动作时间短、速度快、力量大、落点刁的效果. 相似文献
7.
我国优秀男子排球运动员跳发球技术分析 总被引：3，自引：0，他引：3
采用录像解析的方法 ,对我国卢卫中等 6名运动员的跳发球技术进行了测定统计与分析 ,得出了影响跳发球的各因素与发球效果间的关系 ,提出了改进建议。 相似文献
8.
石松源 《体育科技文献通报》2008,16(1):25-27
大力跳发球是当今排坛主流的发球方式，通过对影响大力跳发球效果的技术、身体素质、心理等方面的分析，找出提高大力跳发球水平的训练方法。 相似文献
9.
对我国优秀女排队员跳发球技术助跑起跳的研究 总被引：5，自引：0，他引：5
邢红林 《西安体育学院学报》1995,(3)
本文通过对我国优秀女排队员跳发球技术动作的拍摄、测试、解析，找出了跳发球助跑、起跳动作的结构特点，以及女排队员助跑、抛球、起跳的技术特征。 相似文献
10.
近年来的排球比赛中,跳发球技术已成为一种威胁力大,破攻多,得分率高的发球方式。但在女排的比赛中,跳发球运用得还较少,效果也比男子的差。为此,本文在分析女排运动员身体素质与男子运动员存在差异及跳发球技术的基本条件后,设计了女排前冲式跳发球技术。并对其进行了力学及技术原理分析,期待它能成为一种新形式的实用技术。 相似文献
11.
马成顺 《山东体育学院学报》2006,22(1):93-95
1前言20世纪90年代以后,随着新规则的实施,跳发球技术得到了飞速发展,因其冲跳距离长、击球点高、力量大、球速快、旋转强,已成为世界女排强队普遍采用的进攻性发球之一和得分主要手段。目前,中国女排在跳发球技术上,无论是在比赛中使用的人数还是使用的次数、效果方面与世界强 相似文献
12.
Comparing the pre- and post-impact ball and racquet kinematics of elite tennis players' first and second serves: a preliminary study 总被引：1，自引：0，他引：1
Chow JW Carlton LG Lim YT Chae WS Shim JH Kuenster AF Kokubun K 《Journal of sports sciences》2003,21(7):529-537
The aim of this study was to compare the pre- and post-impact three-dimensional kinematics of the ball and racquet during first and second serves performed by elite tennis players. Data were collected from four male and four female right-handed professional players during competition using two high-speed cameras (200 Hz). For each player, one first serve and one second serve from the 'deuce' or right service court that landed within the specified target area were analysed. To test for significant differences between the first and second serves, Wilcoxon tests (P < or = 0.05) were performed on selected parameters. The results indicate that the ball travelled forward and to the left during the flight phase of the toss in all but one trial. The average pre-impact ball forward location for the first serve was significantly more in front and had a higher associated forward ball velocity than the corresponding values for the second serve. On average, the decrease in post-impact ball speed from the first to the second serve was 24.1%. No significant differences between the first and second serves were found in the pre-impact racquet head speed and orientation, which was represented as a unit vector perpendicular to the racquet face. The major adjustments made by the players when going from the first to second serve were a decrease in pre-impact ball forward location (P < or = 0.01) and an increase in the pre-impact racquet vertical and lateral velocities (both P < or = 0.05). This implies that the players tossed the ball closer to the body and imparted topspin and sidespin on the ball by changing the racquet vertical and lateral velocities when going from the first to the second serve. 相似文献
13.
David Whiteside Bruce Clifford Elliott Brendan Lay Machar Reid 《Journal of sports sciences》2015,33(7):675-686
Enhancing the understanding of coordination and variability in the tennis serve may be of interest to coaches as they work with players to improve performance. The current study examined coordinated joint rotations and variability in the lower limbs, trunk, serving arm and ball location in the elite female tennis serve. Pre-pubescent, pubescent and adult players performed maximal effort flat serves while a 22-camera 500 Hz motion analysis system captured three-dimensional body kinematics. Coordinated joint rotations in the lower limbs and trunk appeared most consistent at the time players left the ground, suggesting that they coordinate the proximal elements of the kinematic chain to ensure that they leave the ground at a consistent time, in a consistent posture. Variability in the two degrees of freedom at the elbow became significantly greater closer to impact in adults, possibly illustrating the mechanical adjustments (compensation) these players employed to manage the changing impact location from serve to serve. Despite the variable ball toss, the temporal composition of the serve was highly consistent and supports previous assertions that players use the location of the ball to regulate their movement. Future work should consider these associations in other populations, while coaches may use the current findings to improve female serve performance. 相似文献
14.
Effect of skill decomposition on racket and ball kinematics of the elite junior tennis serve 总被引：1，自引：0，他引：1
Reid M Whiteside D Elliott B 《Sports biomechanics / International Society of Biomechanics in Sports》2010,9(4):296-303
Whole body kinematics of the tennis serve have been reported extensively in the literature, yet comparatively less information exists regarding the kinematic characteristics of the swing and toss. In attempting to develop consistency in placement of the toss and racket trajectory, coaches will often decompose the serve and practice it in separate parts. A 22-camera VICON MX motion analysis system, operating at 250 Hz, captured racket, ball and hand kinematics of the serves of five elite junior players under three conditions. The conditions were flat first serves (FS) directed to a 1 x 1 m target bordering the 'T' of the deuce service box, a ball toss (BT) in isolation and a free swing (SW) in isolation. Players were instructed to perform BT and SW as in the FS. Paired t-tests assessed within-group differences in hand, racket and ball kinematics between the discrete skill and the two decomposed conditions. Vertical displacement of the ball at its zenith increased significantly during BT compared with the FS and temporal associations between racket and ball motion during the FS (r = 0.861) were affected during task decomposition. This study questions the pervasive use of task decomposition in the development of the tennis serve. 相似文献
15.
Serving to different locations: set-up, toss, and racket kinematics of the professional tennis serve
Reid M Whiteside D Elliott B 《Sports biomechanics / International Society of Biomechanics in Sports》2011,10(4):407-414
The serve, as the most important stroke in tennis, has attracted considerable biomechanical interest. Of its component parts, the swing has received disproportionate research attention and consequently, little is known regarding toss kinematics. Indeed, the age-old question of whether players serve to different parts of the court from the same toss remains unanswered. Six right-handed professionally ranked players hit first serves (FSs) and second serves (SSs) to three 2 x 1 m target areas reflecting the landing locations of T, body and wide serves, respectively, on the deuce court. A 22 camera, 250 Hz VICON MX motion analysis system captured racket, ball, foot, and h and kinematics. Repeated measures ANOVAs assessed within-player differences in foot, racket, and ball kinematics within the FS and SS as a function of landing location. The positions of the front foot, ball zenith, and ball impact were significantly different in the FS, while kinematics across all SS were consistent. Front foot position was closer to the centre mark in the T FS and players impacted the ball further left in the wide FS compared to the T FS. This study discusses the findings in the context of the development of the serve as well as potential implications for the return. 相似文献
16.
Machar Reid Bruce Elliott 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(4):296-303
Whole body kinematics of the tennis serve have been reported extensively in the literature, yet comparatively less information exists regarding the kinematic characteristics of the swing and toss. In attempting to develop consistency in placement of the toss and racket trajectory, coaches will often decompose the serve and practice it in separate parts. A 22-camera VICON MX motion analysis system, operating at 250 Hz, captured racket, ball and hand kinematics of the serves of five elite junior players under three conditions. The conditions were flat first serves (FS) directed to a 1 × 1 m target bordering the ‘T’ of the deuce service box, a ball toss (BT) in isolation and a free swing (SW) in isolation. Players were instructed to perform BT and SW as in the FS. Paired t-tests assessed within-group differences in hand, racket and ball kinematics between the discrete skill and the two decomposed conditions. Vertical displacement of the ball at its zenith increased significantly during BT compared with the FS and temporal associations between racket and ball motion during the FS (r = 0.861) were affected during task decomposition. This study questions the pervasive use of task decomposition in the development of the tennis serve. 相似文献
17.
Kristensen LB Andersen TB Sørensen H 《Sports biomechanics / International Society of Biomechanics in Sports》2004,3(2):195-208
This study looks at segmental movements in the jumping header from an optimization viewpoint. Investigations on the header so far have focused on head restriction in the movement but have not clarified how and to what extent body segments influence the performance of the skill. In the present study a biomechanical model was used to analyze the jumping header in simulated competition to give a clear picture of an optimized header. Skilled soccer players headed balls at speeds of 13 m x s(-1) the results indicated that the head moves as a free non-restricted segment in the jumping header and should be allowed to do so, even though much soccer literature says otherwise to prevent injuries. The arm movement showed individual characteristics and gave no general advantages in optimizing ball speed after impact in the header The movement of the legs was, on the other hand, the single most important factor in the skill. Therefore, coaches and players shouldfocus on developing muscle strength in the stomach, back and pelvis and should put no restrictions on head and arm movement to optimize the jumping header. 相似文献
18.
女子水球运动员跳跃技术训练要根据女子运动员自身的特点。在跳跃技术动作运用、训练的安排、强度、方法上应区别于男子运动员。 相似文献
19.
采用三雏DLT录像解析法对中国女排队员王一梅强攻扣球技术动作进行解析。结果表明，王一梅在助跑阶段的最大水平速度分别为375cm／s；起跳瞬间两足间距离的长短与起跳时间有密切关系，即两脚间距离越短、起跳时间也越短，起跳动作完成的越快。王一梅空中击球技术特征。击球点高，空中击球前合理运用了躯干向后展体扭转，以加大躯干扭转角度。击球瞬间有助于快速屈体，和加快扭转角速度、致使躯干连接部胸骨上缘的速度加快，并依次带动肩、肘、手指掌关节点速度的加快，并达到最高速度峰值。 相似文献
20.
优秀男排运动员沙滩排球扣球技术的运动学比较研究 总被引：15，自引：0，他引：15
王红英 《上海体育学院学报》1996,20(2):60-65
采用高速摄影与影片解析的方法,对我国优秀男排运动员的沙滩排球与室内排球扣球技术动作进行了运动学比较研究。结果表明,沙滩排球与室内排球扣球技术动作间的差异,主要体现在助跑与起跳两个关键的技术坏节上。其原因在于,沙滩排球助跑过程对重心的稳定性要求较高;起跳过程中的体能消耗较大,纵跳高度低于室内;击球时对控制球的能力要求较高。 相似文献