共查询到18条相似文献，搜索用时 234 毫秒
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本文通过对我国优秀标枪运动员和世界优秀标枪运动员投掷步技术的分析与对比,结果发现：我国男子标枪运动员投掷步第1、2步躯干后倾角过大,第2～3步躯干后倾角变化幅度相对较小,以至于交叉步的动作速度及幅度受到影响;女子标枪运动员交叉步下肢前移幅度过小,影响躯干相关肌群收缩;我国男女运动员投掷步第4步都存在躯干后倾角下降较大,左膝弯屈角较小,左侧支撑无力的共性特征。 相似文献
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我国优秀标枪运动员投掷步技术分析 总被引：5，自引：0，他引：5
通过对我国优秀标枪运动员 2 9人次投掷步技术纪录影片的解析 ,并与世界优秀运动员投掷步有关环节运动学参数变化的对比分析发现 ,我国男子标枪运动员投掷步第 1、2步躯干后倾角过大 ,使第 2～ 3步躯干后倾角变化量相对较小 ,影响了交叉步的动作幅度。我国女子标枪运动员交叉步存在的主要问题是下肢前移幅度不够。男女运动员都存在着投掷步第 4步左膝弯屈程度较大 ,左侧支撑无力的现象。 相似文献
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我国优秀标枪运动员陈奇投掷步技术特点分析 总被引：6，自引：0，他引：6
采用高速摄像、录像解析及比较分析方法,对我国优秀标枪运动员陈奇投掷步相关运动学参数进行比较分析。结果发现陈奇投掷步的技术特点:助跑距离较长、助跑速度较快,第二交叉步前后速度损失同投掷成绩呈负相关;第一交叉步前后身体重心速度的增加幅度同交叉步前后躯干后倾角变化量呈负相关,第二交叉步前后身体重心速度的损失幅度同交叉步前后躯干后倾角变化量呈负相关;最后一步前后身体重心水平速度的损失幅度同躯干后倾角变化量呈正相关。 相似文献
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我国优秀女子标枪运动员投掷步技术的运动学研究 总被引：3，自引：1，他引：2
对十运会田径比赛女子掷标枪决赛前8名运动员的投掷步技术进行解析研究。结果表明,我国优秀女子标枪运动员助跑速度快,但速度利用率却不高;投掷步时短,步频快,不能为最后的用力做好充分的准备;投掷各步躯干后倾角变化小,对标枪施力不够;左脚落地时膝角缓冲过大,制动效果差。同时,投掷成绩与最后交叉步后身体重心水平速度在一定程度上呈正相关。 相似文献
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高校高水平男子标枪运动员投掷步最后用力运动学参数的比较研究 总被引：1，自引：0，他引：1
通过文献资料法查阅到我国部分高校高水平男子标枪运动员投掷步、最后用力两阶段的相关运动学参数，并与世界优秀标枪运动员有关运动学参数进行对比，发现高校高水平男子标枪运动员投掷步第1,第2步和交叉步以及右腿最后用力等方面存在一些问题，并对此进行分析与比较。 相似文献
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对我国优秀标枪运动员投掷步技术的力学解析 总被引：6，自引：1，他引：5
通过对我国优秀标枪运动员投掷步与世界优秀选手投掷步躯干后倾角等运动生物力学参数的对比分析,发现我国标枪运动员在投掷步和最后用力技术上存在着一定的差距,这是影响运动员成绩提高与稳定的原因之一。为了提高我国标枪运动成绩,完善我国运动员投掷步技术是十分必要的。 相似文献
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采用文献资料法,专家访谈法和比较分析法,对我国与国外优秀男女标枪运动员投掷步相关运动学参数的比较分析,试图进一步认识交叉步动作的作用,进而改善投掷步(交叉步)技术动作. 相似文献
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采用高速摄影对高校高水平男子标枪运动员投掷步和最后用力两阶段进行定点拍摄获得相关运动学参数,同时根据世界优秀标枪运动员有关运动学参数进行对比分析.结果:投掷步获得的动量和扭转力矩缺位,导致"鞭打"、"满弓型"无法完成,投掷步第一、二步躯干角度小,交叉步后倾角度过大. 相似文献
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我国男子标枪运动员投掷步技术缺陷的原因分析 总被引：4，自引：0，他引：4
通过对我国男子标枪运动员和世界优秀男子标枪运动员投掷步生物力学参数的对比,并结合运动生物力学等方面的知识。对现阶段我国男子标枪投掷步技术缺陷的主要原因进行了分析。指出转体是投掷步技术中每一环节的重要组成要素,我国男子标枪技术主要缺陷就是由转体的不完善引起的。通过调整投掷步中各环节的转体幅度和转体时机,可以改正当前我国男子标枪投掷步技术的缺陷。 相似文献
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Javelin throwing is technically demanding. Sequences of upper and lower extremity motions are important for javelin throwing performance. The purpose of this study was to determine the general sequences of upper and lower extremity motions of elite male and female javelin throwers. Three-dimensional kinematic data were collected for 32 female and 30 male elite javelin throwers during competitions. Shoulder, elbow, wrist, hip, knee, ankle, lower trunk, and upper trunk joint and segment angles were reduced for the best trial of each participant. Beginning times of 6 upper extremity and 10 lower extremity joint and segment angular motions were identified. Sequences of the upper and lower extremity motions were determined through statistical analyses. Upper and lower extremity motions of the male and female elite javelin throwers followed specific sequences (P?≤?0.050). Upper extremity motions of the male and female elite javelin throwers did not follow a proximal-to-distal sequence as suggested in the literature. Male and female elite javelin throwers apparently employed different sequences for upper and lower extremity motions (P?相似文献
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Viitasalo J Mononen H Norvapalo K 《Sports biomechanics / International Society of Biomechanics in Sports》2003,2(1):15-34
Range in javelin throwing is determined by the release parameters and aerodynamic factors. The current study was designed to investigate the effects of release speed, release angle and uncorrected angle of attack measured at the foul line on the official javelin throwing result. The data were collected in international competitions for 26 elite male and 15 elite female javelin throwers (total 248 throws). Multiple regression models were constructed to predict the range of throw for a) individual throwers, b) a group of throwers using the mean value for each thrower in the analysis, and c) all individual throws registered for each gender separately. The data collection was carried out using a computerised photocell gate that consists of two invisible infrared walls two metres apart, perpendicular to the throwing direction. Release speed was found to have the highest correlation with the official throwing result. The three release parameters accounted for 56% of the variance in the official result for the male and 51% for the female throwers. For individual male and female throwers, the variance explained by the model was between 46 and 87%. Among the individual male throwers an increase of 1 m.s-1 in the release speed from 29 to 30 m.s-1 was calculated to increase the official result between 2.12 to 6.14 m while among the female throwers the effect of increase from 24 to 25 m.s-1 in the release speed was from 2.25 to 3.68 m. The study emphasises the importance of investigating javelin throwing biomechanics on an individual thrower basis. 相似文献
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本文以中外优秀男子标枪运动员为对象,从力学角度分析了低重心标枪和旧标枪的特性,通过对新旧标枪的投掷技术的对比研究,得出新旧、标枪在气动性能方面存在明显差异。本文还探索了我国男子标枪运动成绩落后的原因,提出了尽快掌握低重心标枪投掷技术的有效方法。 相似文献
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对我国优秀女子标枪运动员早衰现象及其训练学原因的探讨 总被引：1，自引：0，他引：1
对我国优秀女子标枪运动员早衰的调查研究表明,我国优秀女子标枪运动寿命比世界选手平均少５．５岁,明显存在早衰现象。从训练学因素研究表明,导致我国女子标枪运动员早衰的原因是：运动负荷过大,基础阶段训练手段单一,大力量练习过多,运动年限较短,过于专项成绩,运动员损伤严重等 相似文献
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Hui Liu Steve Leigh 《Sports biomechanics / International Society of Biomechanics in Sports》2014,13(1):17-32
The purpose of this study was to determine the effects of sequences of the trunk and arm angular motions on the performance of javelin throwing. In this study, 32 male and 30 female elite javelin throwers participated and were separated into a short official distance group or a long official distance group in each gender. Three-dimensional coordinates of 21 body landmarks and 3 marks on the javelin in the best trial were collected for each subject. Joint center linear velocities and selected trunk and arm segment and joint angles and angular velocities were calculated. The times of the initiations of the selected segment and joint angular motions and maximum angular velocities were determined. The sequences of the initiations of the selected segment and joint angular motions and maximum angular velocities were compared between short and long official distance groups and between genders. The results demonstrated that short and long official distance groups employed similar sequences of the trunk and arm motions. Male and female javelin throwers employed different sequences of the trunk and arm motions. The sequences of the trunk and arm motions were different from those of the maximal joint center linear velocities. 相似文献
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结合国内外关于标枪运动员力量训练研究的文献资料，找出适合我国运动员的训练方案，进而归纳出能提高标枪运动员力量素质的训练方法和依据。标枪运动员的训练应以发展速度力量为主。专项投掷力量的训练应与技术紧密结合，标枪运动员的力量训练应遵守循序渐进的原则，选择正确的力量训练手段，贯穿到整个训练计划中去。 相似文献
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In order to determine the usefulness of neural models in optimisation of recruitment processes, statistical analyses were
carried out on measured results of javelin throwers using a full take off. A group of 140 Polish junior javelin throwers took
part in the research. In order to choose the optimum combination of model parameters the Hellwig method was used. Linear and
multilayer perceptron neural models were constructed and used to calculate combinations of variables. Statistical analysis
of the results showed that the linear model was not able to describe precisely the relationship between the dependent variable
and independent variables for the investigated group of young javelin throwers. For the investigated group, the perceptron
network with a 4-3-2-1 structure gave the best predictive relationship for sports results of the javelin throwers. 相似文献