中外优秀女子排球运动员跳发球助跑起跳动作运动学分析

通过对杨吴等四国中外优秀女排运动员跳发球助跑起跳动作运动学的分析,揭示四国优秀女排运动员跳发球助跑起跳运动学的特征,探讨时间、速度、距离、角度参数对跳发球技术效果的影响,以期为以后的训练和教学提供科学依据,为提高中国女子排球运动员跳发球技术水平提供参考.     

中外优秀男子排球运动员跳发球负荷量与效果

以第 1 4届世界男子排球锦标赛中外 8支参赛队运动员为研究对象 ,从跳发球运用的数量百分比、跳发球速度、发球区域、落点、路线 5个方面揭示中外运动员跳发球技术运用的负荷量与效果 ,以确定中国队与世界强球队比赛跳发球技术运用的差距     

跳发球技术的机理解析

本文通过对我国男排优秀运动员跳发球技术动作的高速摄影及数据的对比分析,从理论上阐述了跳发球技术的机理,并提出了合理的助跑速度、起跳角度和身体动作。     

上海男子排球运动员大力跳发球技术动作的诊断

从国家男排部分上,海籍运动员的大力跳发球技术测试效果入手,分析与诊断影响其大力跳发球技．概动作的主要因素,并就发球抛球、发球速度的固定等两方面进行具体的分析与讨论。同时对两名优秀选手的腰背肌肉力量进行监测、综合评价其大力跳发球技术动作利弊特征,并做相关的比较研究。经运动学分析,总体上两名运动员的大力跳发球抛球时间偏短、击球点偏低,一造成共发球球速慢且失误率高等,并建设性的提出跳发球技术动作诊断应因人而异,最大限度地挖掘个人技术动作的局部潜优势。     

我国男排大力跳发球速度影响因素的研究

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。     

优秀沙滩排球运动员徐林胤跳发球运动学分析

徐林胤是中国优秀男子沙滩排球运动员,曾与吴鹏根组合,获得2008年北京奥运会第九名,2010年广州亚运会冠军。对徐林胤的跳发球动作助跑起跳环节进行运动学研究,结果表明,徐林胤跳发球动作相对比较成熟,但仍存在缓冲时间过长,最大缓冲时刻膝角稍小,击球点靠后的不足,同时相关部位的肌肉力量的薄弱使得徐林胤跳发球速度受到限制。     

陈方跳发球技术动作的特征分析

通过三维高速录像分析表明,中国选手陈方跳发球的起跳角度选择适当,起跳速度合理,起跳效应好。转体、伸肩、收腹幅度较大,肩、肘、腕的动量传递和积累效果好,使手在击球时产生最大的加速度,触球时间长,故而击球力量大,跳发球速快。     

对国家男排队员跳发球技术的运动学比较研究

跳发球是近年来国内外男排比赛中主要的发球得分手段。本文通过对5名,中国男排队员的跳发球技术及2号位扣球技术、正面上手发球技术的影片解析,获取了跳发球技术的特征;揭示了跳发球与2号位扣球及正面上手发球在技术上的不同点,从而为跳发球训练提供一些理论依据和运动学参数。     

优秀男排运动员大力跳发球技术"六度"环节因素分析

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。     

男子排球运动员跳发球效果的分析研究

通过对中国队一系列比赛中跳发球情况的统计,运用数据分析、对比等方法,探讨中国男排在跳发球方面的得分能力以及同国外男子排球运动员跳发球效果的差异,结合跳发球效果运用的环节因素角度对该项目进行分析,为今后在大赛中跳发球效果的改进提供参考依据。     

虞轶群跳远技术分析

本文运用高速摄影、影片解析方法,分析虞轶群跳远助跑和起跳步长及起跳腿膝关节角度等技术指标,发现其助跑最后3步速度较快,但助跑节奏不够稳定,步幅变化较大,靠视觉感知来调整步长。在起跳蹬伸阶段,起跳腿膝关节蹬伸幅度和蹬伸角速度与世界优秀运动员有一定差距。     

浅析少年女子跳发球技术及其训练方法

作者根据多年来训练女子排球的实践,通过少年女子排球运动员训练跳发球前后成绩,以及不同类型队员的训练比赛数据统计分析认为:跳发球技术应当在少年阶段及早进行规范化训练,并系统总结跳发球的技术动作及其训练要领,跳发球训练中要解决如何克服技术障碍,掌握跳发球训练的基本方法,同时强调根据条件,有选择的训练跳发球,才能达到事半功倍的效果。     

Vertical jumping height and horizontal overhead throwing velocity in young male athletes.

The purpose of this study was to examine the effects of calendar and skeletal age, anthropometric dimensions, training history and their interactions on vertical jumping height and horizontal overhead throwing velocity in a cross-section of 318 young male athletes (age range 9-16 years) participating in cross-country skiing (n = 70), basketball (n = 40), apparatus gymnastics (n = 19), ice hockey (n = 50), track and field (n = 89) and wrestling (n = 50). Vertical jumping height was measured with four different loads held on the shoulders and then interpolated for loads representing 0 and 40% body mass. Horizontal overhead throwing velocity using both hands was determined for seven balls of different weights and then interpolated for weights representing 1 and 5% body mass. Both vertical jumping height and overhead throwing velocity were found to increase (P < 0.01) from the skeletally youngest to the oldest cohort when the effects of body height and mass were controlled. The inter-event comparisons did not reveal statistically significant differences in respect of vertical jumping height. Also in the overhead throwing tests, the inter-event differences were small, although the analysis of variance revealed statistically significant (P < 0.001) differences for the skeletal age cohorts of 13 and 14 years. While the quantity of training had no effect on vertical jumping height, it explained the results in the overhead throwing test. The effects of training on vertical jumping and horizontal overhead throwing among adolescent athletes were considered to be small, while maturational processes and anthropometric development followed by increase in calendar age were deemed to be of greater importance.     

沙滩排球与室内排球扣球起跳阶段人体重心运动特征的生物力学对比研究

采用摄像与录像解析的方法对沙滩排球与室内排球扣球起跳阶段人体重心的运动特征进行了运动生物力学对比研究。沙滩排球扣球起跳与室内排球扣球起跳相比 ,人体重心运动特征表现为 :起跳过程水平速度损失小 ,离地时刻水平速度大 ;加速蹬伸阶段人体重心上升位移短 ,垂直腾起速度小 ;人体重心腾起角小     

对沙滩、室内排球扣球起跳阶段时相特征的比较研究

运用运动生物力学手段对沙滩、室内排球扣球起跳时相特征进行比较研究,结果发现:沙滩排球上步扣球起跳阶段依据人体下肢肌肉工作形式以及重心速度随时间的变化可划分为5个部分,即加速缓冲、减速缓冲、等长制动、加速蹬伸和减速蹬伸。其中沙滩排球加速缓冲与减速缓冲时间均过长,不利于缩短起跳时间,影响沙滩排球扣球的起跳效果。另外,沙滩排球扣球起跳的加速蹬伸时间占起跳时间的比重太小是影响在沙滩上起跳时间结构的关键因素。     

Vertical jumping height and horizontal overhead throwing velocity in young male athletes

Abstract

The purpose of this study was to examine the effects of calendar and skeletal age, anthropometric dimensions, training history and their interactions on vertical jumping height and horizontal overhead throwing velocity in a cross‐section of 318 young male athletes (age range 9–16 years) participating in cross‐country skiing (n = 70), basketball (n = 40), apparatus gymnastics (n = 19), ice hockey (n = 50), track and field (n = 89) and wrestling (n = 50). Vertical jumping height was measured with four different loads held on the shoulders and then interpolated for loads representing 0 and 40% body mass. Horizontal overhead throwing velocity using both hands was determined for seven balls of different weights and then interpolated for weights representing 1 and 5% body mass.

Both vertical jumping height and overhead throwing velocity were found to increase (P< 0.01) from the skeletally youngest to the oldest cohort when the effects of body height and mass were controlled. The inter‐event comparisons did not reveal statistically significant differences in respect of vertical jumping height. Also in the overhead throwing tests, the inter‐event differences were small, although the analysis of variance revealed statistically significant (P< 0.001) differences for the skeletal age cohorts of 13 and 14 years. While the quantity of training had no effect on vertical jumping height, it explained the results in the overhead throwing test.

The effects of training on vertical jumping and horizontal overhead throwing among adolescent athletes were considered to be small, while maturational processes and anthropometric development followed by increase in calendar age were deemed to be of greater importance.     

对女子跳马踺子上板类技术的探讨

对体操动作技术的研究，其实质就是对最佳化的研究，本文通过文献资料。从踺子上板时水平速度与垂直速度，踏跳和起跳阶段运动参数的变化。第二腾空运动参数的四个方面，对女子跳马踺子上板类进行了初步探讨，旨在改变我国跳马落后的局面。     

对我国优秀男子背越式跳高运动员起跳技术的三维运动学分析

采用爱捷运动录像快速反馈系统EIMG90,对背越式跳高起跳技术进行细致的分析,结果表明在摆动腿蹬离地面至起跳腿着地支撑阶段，我国运动员两腿着地点近，身体重心向下垂直速度小，这有利于保持起跳前的速度，起跳脚着地瞬间至最大缓冲阶段，摆动腿摆动角速度与起跳腿蹬离地面瞬间的重心向上垂直速度相关，与世界优秀运动员比，我国运动员在着地支撑瞬间身体内倾不够。