共查询到19条相似文献，搜索用时 580 毫秒
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表面肌电图技术是通过肌电图仪采集肌肉表面电信号并加以分析的方法，本文通过对国家射箭队24名运动员进行肌电测试并现场反馈，帮助运动员提高射箭技术动作，解决稳定性、一致性等问题。 相似文献
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运用芬兰Mega6000-T16表面肌电遥测系统对优秀射箭运动员永富军射箭专项技术动作进行测试分析,结果表明：永富军的射箭技术动作肌肉用力中,其持弓臂的三角肌和拉弓臂的三角肌,拉弓臂的背阔肌和斜方肌是射箭的主要用力肌群;其肌肉激活顺序都是持弓臂三角肌前部率先被激活,其次是三角肌中部、三角肌后部等肌肉,肌肉激活一致性相对合理;肌肉激活程度的一致性与动作技术与射箭成绩密切相关。 相似文献
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利用表面肌电图仪,对虹口剑校3名优秀女子花剑运动员进行肌电测试,分析这3名运动员在完成刺剑技术动作时的肌电信号变化,探讨女子花剑运动员训练肌肉的肌电活动特点。通过肌电活动及肌肉用力状态,对花剑刺剑技术进行研究,为选择针对性更强的专项训练方法、手段提供建议和参考。 相似文献
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对10名武汉体育学院武术系有易筋经锻炼基础的男生练习传统和新编"健身气功·易筋经"的十二势动作,分别选取各动作有代表性的主动肌或被动肌,如前臂内、外侧肌群等,采用表面肌电图技术同步观察各肌群放电信号,取最大振幅、均方根振幅和积分肌电值进行比较研究.数据经SPSS13.0软件包进行统计学处理,发现新编和传统"健身气功·易筋经"十二势动作中相关肌群肌电参数在肌肉用力及用力过程中的有显著性差异,新编后十二势动作对于发力的肌肉群、肌肉发力的大小、发力均匀程度上更趋合理.通过肌电分析找出正确动作的用力肌肉和用力过程,有助于科学指导易筋经的教学和推广. 相似文献
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采用表面肌电对人体16块肌肉进行肌电测试,结合录像解析,分析高水平旋转推铅球运动员最后用力阶段表面积分肌电贡献率的大小,结果表明该阶段主要的用力肌肉为右腹外斜肌、左腿股直肌、右腿股直肌、左腿腓肠肌、右腿腓肠肌、三角肌和胸大肌。该阶段发力肌肉积分肌电贡献率的大小与该阶段的技术动作特点有密切关系。在平时训练时应注意发展主要发力肌肉的力量,同时也应该注意发展与此相关的其他肌肉的力量。 相似文献
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运用JE-TB0810八通道肌电采集测试系统和ISOMED2000等速测试训练系统,对两名国际健将级跆拳道运动员分别进行肌电和等速肌力测试,旨在确定跆拳道运动员后横踢技术动作的主要发力肌肉、肌肉用力持续时间、肌肉用力大小以及肌肉用力的协调性;其次是诊断影响后横踢技术动作的髋、膝关节在不同运动速度下肌力的屈伸比例、异侧同名肌群的肌力比例和肌肉功率特征.研究发现:在后横踢左脚前右脚后的实战动作技术中,主要发力肌肉是右股二头肌、左右侧臀大肌、右股直肌、左右股内侧肌、左股直肌、腓肠肌.在诊断分析影响后横踢技术动作时,需要考虑髋、膝关节屈伸肌力和做功功率的平衡性,以及左右侧同名肌群肌力和功率的大小. 相似文献
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研究目的:选取国家队优秀男子跆拳道运动员的后横踢技术动作进行肌电分析,揭示跆拳道运动员的用力特征。研究方法:运用美国产Noraxon表面肌电遥测系统对14名国家跆拳道队男子运动员进行测试,并根据后横踢技术特点,分别选取了三组肌肉进行测试。研究结果:1)从肌肉的激活顺序来看,以左侧竖脊肌、左侧胫骨前肌最先发力,但与此同时,右侧的胫骨前肌和腓肠肌也同时被激活;2)从肌力特征来看,右侧肌群的肌力值相对较大,在整个的后横踢技术动作中占有绝对的优势,相比之下,左侧肌群肌力较小,并且肌肉的募集能力相对较低(40%以下);3)在肌电的持续时间上,左侧肌群持续时间相对较短(0.20s以下),右侧肌群持续时间较长,表明它们是主要做功肌群,但左侧半腱半膜肌无论是在肌力动员方面(46.8%),还是在积分肌电方面(326.00uv.s),或是在激活顺序(0.06s)和持续时间上(0.70s),都表现出非常高地贡献作用。研究结论:由于左侧和右侧具有同时肌肉放电的现象,因此,训练中在加强左侧支撑用力的同时,应逐步提高运动员动作腿的起动速度训练,并加强右侧主动肌和拮抗肌的用力效果。此外,应特别关注左侧半腱半膜肌等肌肉的力量训练。 相似文献
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2种不同起跑动作的生物力学实验研究 总被引：7，自引：0，他引：7
采用测力台与肌电同步的方法对 4名一级短跑运动员的蹲踞式与站立式起跑动作进行了运动生物力学分析。研究结果 :蹲踞式起跑中水平支撑反作用力明显大于站立式起跑时水平支撑反作用力 ;蹲踞式起跑和站立式起跑中的肌肉活动顺序即肌肉用力顺序各不相同 ;蹲踞式起跑和站立式起跑中肌肉的肌电活动时间和幅度 ,即肌肉用力程度各不相同 ,在蹲踞式起跑中右股直肌用力程度最大 ,而站立式起跑中右腓肠肌用力最大 ;股直肌和腓肠肌是这 2种起跑姿势的主要用力肌群 相似文献
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射箭运动技术诊断是该项目科学化训练的难点和要点,研究结果发现,通过超高速影像和三维红外线运动学分析的方法,以及高精度的时间、速度、位移等系列运动学指标的测量和射箭运动力学原理的综合运用,能够有效地监控射箭运动员的专项技术状态;高水平射箭运动员专项技术动作具有撒放时间短、声动反应快、箭速高、动作稳定性和一致性高的特点;另外,从功能原理与专项技术规律角度深入分析了反向动作与动作效率、动作稳定性等要素的因果关系,提出了优化撒放方式、减小反向动作幅度、增强动作控制能力是提高射箭技术水平的重要途径。 相似文献
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Fine body movements and the cardiac cycle in archery 总被引：3，自引：1，他引：2
This study examined the relationships between postural sway, aiming time, the cardiac cycle time and the placement of the first finger movement within the electrocardiac cycle, with the quality of the arrow shot. A small group of elite male and female archers who shot either the recurve or the compound bow, freestyle or bare bow was used in this study. A total of 240 arrows were shot, classified as being of good, average or bad quality and analysed in detail. The analyses were undertaken over two occasions up to 100 days apart. The area of postural sway, as measured by the movement of the centre of pressure coordinates, varied significantly (P less than 0.05-0.001) both within and between trials for all archers and for all quality of arrows shot. There was a tendency for the area of postural sway to increase as the quality of the arrow shot decreased. This increase in postural sway exceeded, for arrows of bad quality, that exhibited as normal postural sway when standing relaxed and addressing the target with the hands at the side. Aiming time was variable within the quality of arrow shot, although it was consistent for each archer. In some cases the aiming time increased as the quality of the arrow decreased, whereas in the case of bare bow archery the aiming time tended to decrease as the quality of the arrow deteriorated. The cardiac cycle time increased significantly (P less than 0.05-0.01) as the archers approached the loose of the good quality arrows but there was no significant increase in cardiac cycle time when arrows of average or bad quality were shot. The most consistent parameter related to the quality of the shot was the placement of the first finger movement within the ST phase or the mid-cycle phase of the electrocardiogram for arrows of good quality (P less than 0.0001). 相似文献
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脑电非线性动力学分析在优秀射箭运动员中枢疲劳研究中的应用 总被引：3，自引：0，他引：3
研究目的:对12名备战北京奥运会的国家射箭队运动员脑电信号的最大李雅普诺夫指数、近似熵与复杂度等3个非线性特征参数进行分析,为研究大脑的高级功能提供了一条新的途径.结果表明:国家射箭队运动员的脑电最大李雅普诺夫指数、复杂度和近似熵等3个非线性特征参数不存在显著男、女性别差异;L-Z复杂度可敏感地反映出运动员是否处于中枢疲劳状态,近似熵可较敏感地反映出国家射箭队优秀运动员在不同的两个阶段中训练负荷的变化.虽然被试运动员的数量有限,但脑电最大李雅普诺夫指数、近似熵和复杂度等3个非线性特征参数与中枢神经疲劳程度之间存在着一定相关关系,对于分析和监测射箭运动员中枢神经系统疲劳程度是一种非常有效的方法,可作为反映其中枢神经系统机能的定性指标. 相似文献
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表面肌电图是从肌肉表面通过电极引导、记录下来的神经肌肉系统活动时的生物电信号。文章测定了山西省12名射箭运动员在日常训练时6块肌肉的肌电信号,并与国家队队员肌电信号进行对比分析和探索山西省射箭运动员技术特征。 相似文献
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《European Journal of Sport Science》2013,13(4):213-222
Abstract At the end of the aiming phase, an archer pulls the arrow back a little bit before he releases the shot. This pulling back of the arrow is called the “final pull”. Simultaneous with the final pull, the archer has to hold the bow calm. The aim of this paper was to examine the motion of the bow and the final pull in highly skilled archers. From a technological point of view, we wished to develop a system to measure the draw-length in the final pull that could be used during archers’ normal training. Seven archers (two males, five females), all of whom were participants at the Junior World Championships and German National Championships, performed 66 shots indoors at a target 30 m away. Each archer shot the same bow as used in competition. On-target trajectories of the aim point movement were measured. Also, the alterations of the draw-length in the final pull were determined. The results suggest that irregularities in the final pull have a negative influence on archers’ scores. Intra-individually, a smaller range of motion of the bow in the last second before the shot appears to have a positive influence on archers’ scores. 相似文献
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A predominant archery coaching tenet holds that the most effective means of releasing the bow string is by relaxation of the finger flexor muscles without activation of finger extensors. To evaluate the validity of this view, EMG patterns of the flexor digitorum superficialis and extensor digitorum muscles of the draw arm were examined using surface EMG electrodes in 15 highly skilled archers as each performed six shots. Each archer displayed consistent EMG patterns from shot-to-shot and two distinct flexor-extensor patterns were exhibited by the sample. The first, characterized by eight of the archers, supported the relaxation principle. For these archers, both flexor and extensor digitorum activity decreased markedly immediately prior to or at arrow release. The second pattern, characteristic of the remaining seven archers, contradicted the coaching tenet. While the flexor digitorum pattern was essentially the same as that described for the first pattern, the extensor digitorum displayed a marked increase in activity just prior to release, indicating that string release was facilitated by an active extension of the fingers. It was concluded that highly skilled archers do not predominantly reflect a release consistent with the coaching canon and that factors other than the string release mechanism discriminate the performances of skilled archers. 相似文献