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自由式滑雪空中技巧着陆稳定性的研究与分析 总被引：6，自引：6，他引：0
通过对自由式滑雪空中技巧着陆稳定性的研究与分析,反映出我国在该项目上存在的问题与不足,提出了着陆稳定性是影响最终成绩的一个重要因素,并且对如何提高着陆稳定性提出了建议,对于促进我国自由式滑雪空中技巧项目的发展大有裨益。 相似文献
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提出一种自由式滑雪空中技巧夏季跳台训练水池气垫式着陆坡的设计方案,讨论了其结构功能及其对提高着陆动作的稳定性作用,旨在将其应用于运动实践中,以此提高运动技术水平. 相似文献
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对自由式滑雪空中技巧落地稳定性的实验研究 总被引：5，自引：2，他引：3
本文对自由式滑雪空中技巧落地稳定性做了实验研究和理论分析。研究结果表明,落地稳定性的成功因素与着陆时的人体剩余动量矩、躯干倾角、着陆时足的加速度、屈膝屈髋速度等因素有关。其中以人体剩余动量矩、躯干倾角引起的克服剩余动量矩的重力矩为最大影响因素,屈膝屈髋速度为重要影响因素,快速的下蹲动作能有效地克服剩余人体动量矩。实测落地成功运动员的着陆人体运动学参数表明,躯干倾角比着陆坡面的垂线倾角小30°左右时落地成功;着陆后处于失稳边缘的运动员使用快速下蹲技术,能使运动员转危为安。 相似文献
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我国自由式滑雪空中技巧运动员3周动作着陆成功率的影响因素 总被引：2，自引：2，他引：0
通过文献资料法和专家访谈法对国家自由式滑雪空中技巧运动员3周动作着陆成功率的影响因素进行研究,旨在找出国家自由式滑雪空中技巧3周动作着陆成功率低的原因,结果表明国家自由式滑雪空中技巧运动员3周动作着陆成功率受技术和非技术两方面因素的影响,导致了运动员着陆成功率很低,直接影响着运动成绩。 相似文献
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《体育健康知识画刊》2010,(2):4-5
跳台滑雪也称“跳雪”。比赛时运动员不用雪杖,不借助任何外务,以自身体重从起滑台起滑,经助滑道获得110公里/小时的高速度,于台端飞起后,沿自然抛物线在空中滑翔,在着陆坡着陆后继续自然滑行到停止区。跳台滑雪的技术动作包括助滑、起跳、空中飞行、着陆四部分。 相似文献
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世界女子自由式滑雪空中技巧重点选手着陆成功率统计分析 总被引：1，自引：1，他引：0
为了解当今女子空中技巧中外重点选手成功着陆的把握性有多大,采用三次文献法按统一标准统计并分析她们在最近年度世界比赛中的着陆成功率,为国家队制定最优化的冬奥会参赛动作方案提供重要参考依据。 相似文献
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自由式滑雪空中技巧着陆动作的成功与否,不仅关系到运动成绩,同时影响安全训练,造成受伤。本文从力量练习的方式,练习的强度和肌肉力量与其收缩速度的关系方面,对着陆动作专项力量练习作出了分析。 相似文献
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自由式滑雪空中技巧运动员落地稳定性主要影响因素的研究 总被引：2，自引：1，他引：1
对自由式滑雪空中技巧运动员落地稳定性问题建立了四个运动环节的人体运动模型。雪板雪靴、足、小腿定义为环节1,大腿定义为环节2,躯干、头定义为环节3,上臂、前臂、手定义为环节4。根据平动动坐标系下相对动量矩定理建立了描述自由式滑雪空中技巧运动员落地稳定性控制人体对人体质心动量矩的模型。模型是有效的,并能反应落地稳定性控制的内在主要影响因素。 相似文献
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对第27届悉尼奥运会我国男子体操选手落地稳定性的统计与分析 总被引：2，自引：0，他引：2
用比赛录像观察、数理统计和文献资料法 ,对第 2 7届奥运会我国男子体操选手落地稳定性进行统计与分析 ,结果表明 ,我国选手在团体、个人全能和个人单项决赛中落地动作完成较差 ,落地稳定性仅达 43 9%。以此为教练员、运动员提供参考和引起重视 相似文献
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技巧单人项目的落地动作稳定性是决定比赛胜负的重要因素。本文总结训练实践的成功经验,结合技术动作的运动生物力学分析,提出提高落地动作稳定性的训练方法,为针对性训练提供科学依据。 相似文献
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文章运用文献资料法、专家访问法、数理统计法、对比分析法、运动生物力学测试法对腾空摆莲转体720度接马步动作的落地稳定性进行分析研究,认为：落地时刻的躯干角大小、腰骶连接点距离地面的高度、腰骶连接点对X轴的水平速度是影响落地稳定性的主要因素;落地时刻躯干角大、腰骶连接点距离地面高、对X轴水平速度小有利于落地稳定性。 相似文献
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武术旋风脚720°接跌叉稳定性的研究 总被引：12，自引：0，他引：12
武术旋风脚 72 0°接跌叉是九运会武术指定动作之一。通过对该组动作落地技术的动力学以及构成稳定性条件的分析 ,提出合理的落地技术和训练中需解决的问题。 相似文献
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竞技武术套路中腾空摆莲B和C级跳跃落地接马步是长拳、南拳武术项目的两个难度动作.通过对该组动作落地技术的动力学及相关稳定性因素的分析,提出合理的落地技术和训练中需解决的问题.采用录像观察与试验分析相结合的方法,针对男女运动员的腾空与落地的特点,提出相应的解决办法和训练理论. 相似文献
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Abstract Dynamic postural stability has been widely studied for single-leg landing, but seldom considered for double-leg landing. This study aimed to evaluate the dynamic postural stability and the influence mechanism of muscle activities during double-leg drop landing. Eight recreationally active males and eight recreationally active females participated in this study and dropped individually from three heights (0.32?m, 0.52?m, and 0.72?m). Ground reaction force was recorded to calculate the time to stabilisation. Electromyographic activities were recorded for selected lower-extremity muscles. A multivariate analysis of variance was carried out and no significant influence was found in time to stabilisation between genders or limb laterals (P?>?0.05). With increasing drop height, time to stabilisation decreased significantly in two horizontal directions and the lower-extremity muscle activities were enhanced. Vertical time to stabilisation was not significantly influenced by drop height. Dynamic postural stability improved by neuromuscular change more than that required due to the increase of drop height. Double-leg landing on level ground is a stable movement, and the body would often be injured before dynamic postural stability is impaired. It is understandable to protect tissues from mechanical injuries by the sacrifice of certain dynamic postural stability in the design of protective devices or athlete training. 相似文献
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Pedro Pérez-Soriano Salvador Llana-Belloch Gaspar Morey-Klapsing Jose Antonio Perez-Turpin Juan Manuel Cortell-Tormo 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(4):245-257
Shock absorption and stability during landings is provided by both, gymnast ability and mat properties. The aims of this study were to determine the influence of different mat constructions on their energy absorption and stability capabilities, and to analyse how these properties affect gymnast's plantar pressures as well as subjective mat perception during landing. Six mats were tested using a standard mechanical drop test. In addition, plantar pressures and subjective perception during landing were obtained from 15 expert gymnasts. The different mats influenced plantar pressures and gymnasts' subjective perception during landing of gymnasts. Significant correlations between plantar pressures at the medial metatarsal and lateral metatarsal zones of the gymnasts' feet with the different shock absorption characteristics of the mats were found. However, subjective perception tests were not able to discriminate mat functionality between the six mats as no significant correlations between the mechanical mat properties with the subjective perception of these properties were found. This study demonstrated that plantar pressures are a useful tool for discriminating different landing mats. Using similar approaches, ideally including kinematics as well, could help us in our understanding about the influences of different mats upon gymnast-mat interaction. 相似文献
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Pérez-Soriano P Llana-Belloch S Morey-Klapsing G Perez-Turpin JA Cortell-Tormo JM van den Tillaar R 《Sports biomechanics / International Society of Biomechanics in Sports》2010,9(4):245-257
Shock absorption and stability during landings is provided by both, gymnast ability and mat properties. The aims of this study were to determine the influence of different mat constructions on their energy absorption and stability capabilities, and to analyse how these properties affect gymnast's plantar pressures as well as subjective mat perception during landing. Six mats were tested using a standard mechanical drop test. In addition, plantar pressures and subjective perception during landing were obtained from 15 expert gymnasts. The different mats influenced plantar pressures and gymnasts' subjective perception during landing of gymnasts. Significant correlations between plantar pressures at the medial metatarsal and lateral metatarsal zones of the gymnasts' feet with the different shock absorption characteristics of the mats were found. However, subjective perception tests were not able to discriminate mat functionality between the six mats as no significant correlations between the mechanical mat properties with the subjective perception of these properties were found. This study demonstrated that plantar pressures are a useful tool for discriminating different landing mats. Using similar approaches, ideally including kinematics as well, could help us in our understanding about the influences of different mats upon gymnast-mat interaction. 相似文献