共查询到19条相似文献，搜索用时 545 毫秒
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运用录像分析系统，分析了我国优秀女子举重运动员的抓举技术，对抓举技术中的预备、提铃、发力、下蹲支撑、上举等5个动作环节进行了阐述，揭示该技术的生物力学特征，为运动员教练员提供可靠的数据参考。 相似文献
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目的：探讨优秀女子举重运动员抓举动作的动力学特点。方法：采用比利时产Footscan足底压力测试系统对四名优秀女子举重运动员的四次成功抓举动作进行分析。结果：（1）四人在抓举整个过程中,身体压力中心的左右波动幅度均大于前后波动幅度。其中发力阶段左右和前后波动最大,而下蹲支撑阶段和提铃阶段波动较小;（2）与其他阶段相比,下蹲支撑阶段的压力中心运动轨迹最小;（3）在抓举整个过程中,身体稳定性顺序为下蹲支撑阶段〉提铃阶段〉上举阶段〉发力阶段,阶段总压力差表现为发力阶段〉下蹲支撑阶段〉上举阶段〉提铃阶段。结论：四人在抓举过程中符合＂近、快、低＂、和下蹲＂低、稳＂的要求。付小娟需加强提铃和上举阶段身体的稳定性,郭晴和张茜需加强发力阶段的稳定性。 相似文献
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运用三维运动学研究方法,对参加2019年亚洲举重锦标赛暨东京奥运会资格赛的我国男子举重67kg公斤级优秀运动员谌利军与冯吕栋抓举技术进行对比分析。研究结果认为:提铃准备阶段,冯吕栋身体姿势更符合抓举中“近”的技术要求;总体上,冯吕栋伸膝提铃和引膝提铃阶段技术动作优于谌利军,谌利军发力和惯性上升及接铃阶段技术动作优于冯吕栋。谌利军抓举过程中主要存在伸膝提铃阶段髋关节打开过早,引膝提铃阶段膝关节回屈角度小以及整个抓举过程中杠铃重心左右偏移量过大的问题;冯吕栋主要存在发力和惯性上升阶段“两心”前后距离过大,杠铃相对于运动员水平运动幅度大,垂直运动幅度小以及接铃过程中杠铃下落距离长,下降速度过快的问题。建议谌利军加强膝关节主要屈伸肌群的力量训练以及进行身体左右侧力量平衡的评估;冯吕栋应掌握在发力和惯性上升阶段正确的用力方向,并改善接铃节奏。 相似文献
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本文根据优秀男子举重运动员和一般运动员的抓举技术动作的对比,进行分析,得出优秀运动员的技术动作优势,为改进运动员的技术动作,提高日常训练水平,提供参考依据,通过对比,笔者发现,从整个抓举过程来看,优秀运动员每一个动作都要比一般运动员准确的多,能够最大程度的降低阻力臂,通过每一个动作的扎实完成,保证整个抓举动作的顺利完成。 相似文献
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《体育科技文献通报》2001,(9)
G884.03 20015401对我国女子举重运动员年龄、体重变化与成绩变化的探讨[刊,中,I]/胡贤豪,毛传俊,强伟,王善良,马文辉,沙峰,杨志俊//中国体育教练员.-2001(1).-18-19表2(SML)举重//女子//运动员//年龄//体重//成绩//探讨G884.119 20015402运用膝上拉抓组合动作提高抓举发力技术的研究[刊,中,I]/张琦,陈孝明,于洪兵//中国体育教练员.2001(1).-32-34表1(SML)举重//抓举//发力技术//膝上拉抓组合动作//技术分析 相似文献
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女子举重运动员抓挺举发力阶段等动肌力的特征 总被引：2，自引：0，他引：2
刘巍中 《上海体育学院学报》1997,(2)
采用高速摄影与等动测试相结合的研究方法,对女子举重运动员抓挺举时的等动肌力特征进行探讨。结果显示,抓举发力阶段,提肘动作发生在伸髋结束时,不同关节等动肌力的比值反映了举重发力动作的先后顺序;抓举与挺举上挺发力阶段的最大相关速度与上肢等动测试的峰力矩,平均功率相关指标有显著性相关,而最大速度与等动测试的峰力矩、平均功率指标无相关性。 相似文献
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方法:运用高速摄相和三维运动解析的方法对运动员的抓举技术进行研究.目的:通过对运动员朱丁梅抓举技术的分析找出运动员技术上存在的不足并进行改进,帮助运动员取得更好的成绩.结果表明:(1)运动员膝关节角、髋关节角比较合理,在发力阶段伸髋不充分.(2)杠铃的运动轨迹偏向后方,没有呈现近似s型,运动员发力时有明显的后跳动作.(3)各阶段时间比和杠铃上升高度比整体较合理,精细化程度不够.结论:(1)发力阶段伸髋不充分影响了运动员的成绩.(2)两心向运动员后上方偏移,抓举技术动作不符合"近"的原则.(3)运动员在抓举90kg时过早发力,当杠铃高度达到最高点时杠铃在支撑点后方不利于支撑,导致后掉失败.(4)抓举的总体节奏较好但是精细化程度还不够.(5)对运动员的后跳动作不予以纠正. 相似文献
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竞技举重运动中的抓举,是一个对技术要求相当高的项目。而在杠铃上升的整个过程中,引膝、耸肩、提肘的发力阶段,又最为重要。从某种意义上讲,这阶段发力的好坏,直接决定着抓举的成败。因此,举重工作者创造了很多提高运动员抓举发力能力的分解练习。如宽发力拉、宽直腿发力拉、垫铃宽拉等等。其中,垫铃宽拉,因其强度大,效果好、能减轻运动员心理压力,受到了举重教练员、运动员的普遍重视。 相似文献
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We investigated the linear kinematics and the change in energy of the barbell and the angular kinematics of the trunk and leg during the snatch technique of 12 elite male Greek weightlifters under competitive conditions after the new weight classification. Two S-VHS cameras operating at 60 Hz were used to record the lifts. The spatial coordinates of selected points were calculated using the direct linear transformation procedure; after digital filtering of the raw data, the angular displacements and angular velocities were calculated for the hip, knee and ankle joints. The following variables were also calculated for the barbell: vertical and horizontal displacement, vertical linear velocity and acceleration, external mechanical work and power output. The results revealed that all weightlifters flexed their knees during the transition phase, independently of their weight category. This indicates that the athletes use the elastic energy produced during the stretch-shortening cycle to enhance their performance. In nine athletes, we found that the barbell trajectory did not cross a vertical reference line that passed through the initial position of the barbell. The vertical linear velocity of the barbell was increased continuously from the beginning of the movement until the second maximum extension of the knee joint, with no notable dip being observed. Regarding the change in energy of the barbell, we found that the mechanical work for the vertical displacement of the barbell in the first pull was significantly greater than the mechanical work in the second pull. In contrast, the estimated average mechanical power output of the athletes during the vertical displacement of the barbell was significantly greater in the second pull than in the first pull. We conclude that the major elements of the snatch technique of elite Greek weightlifters have not been affected by the new weight classification. 相似文献
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Vassilios Gourgoulis Nickos Aggelousis Giorgos Mavromatis Athanasios Garas 《Journal of sports sciences》2013,31(8):643-652
We investigated the linear kinematics and the change in energy of the barbell and the angular kinematics of the trunk and leg during the snatch technique of 12 elite male Greek weightlifters under competitive conditions after the new weight classification. Two S-VHS cameras operating at 60 Hz were used to record the lifts. The spatial coordinates of selected points were calculated using the direct linear transformation procedure; after digital filtering of the raw data, the angular displacements and angular velocities were calculated for the hip, knee and ankle joints. The following variables were also calculated for the barbell: vertical and horizontal displacement, vertical linear velocity and acceleration, external mechanical work and power output. The results revealed that all weightlifters flexed their knees during the transition phase, independently of their weight category. This indicates that the athletes use the elastic energy produced during the stretch–shortening cycle to enhance their performance. In nine athletes, we found that the barbell trajectory did not cross a vertical reference line that passed through the initial position of the barbell. The vertical linear velocity of the barbell was increased continuously from the beginning of the movement until the second maximum extension of the knee joint, with no notable dip being observed. Regarding the change in energy of the barbell, we found that the mechanical work for the vertical displacement of the barbell in the first pull was significantly greater than the mechanical work in the second pull. In contrast, the estimated average mechanical power output of the athletes during the vertical displacement of the barbell was significantly greater in the second pull than in the first pull. We conclude that the major elements of the snatch technique of elite Greek weightlifters have not been aff ected by the new weight classification. 相似文献
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Sezgin Korkmaz 《Journal of sports sciences》2016,34(11):1088-1093
The strength and technical competence of junior female lifters play a decisive role not only for their current but also adulthood performance. The objective of this study was to investigate the three-dimensional kinematics of the snatch technique in junior female weightlifters. Ten elite junior female weightlifters participated in the study. Two cameras operating at 50 fields per second were used to record the lifts. The heaviest successful lifts were selected for the kinematic analysis. The kinematical data were obtained using a motion analysis system. The duration of the first pull was significantly longer than that of the other phases (P < 0.05). Maximum extension angle and velocity of the lower limb joints were significantly greater in the second pull (P < 0.05). The greatest extension angle was found in the knee joint during the first pull, while the greatest extension angle was observed in the hip joint during the second pull (P < 0.05). Maximum extension velocity of the knee and hip joints was significantly greater than that of the ankle in both phases (P < 0.05). In addition, the vertical velocity of the barbell and the absolute and relative power outputs was significantly higher in the second pull than in the first pull (P < 0.05). In the snatch lifting of junior female weightlifters, the angular kinematics of lower limb joints, the linear kinematics and trajectory of the barbell and other energy characteristics are similar to and consistent with the values reported in literature for adult female weightlifters. 相似文献
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我国优秀举重运动员体能模型研究 总被引：1，自引：0，他引：1
以我国优秀举重运动员为研究对象,通过文献资料调研和数理统计的等方法,建立我国优秀举重运动员体能模型(包括指标模型、权重模型、均值模型与评价体系)。结果表明,优秀举重运动员体能指标模型包括:肩宽、髂宽指数、克托莱指数、血睾酮、高抓、借力推、体前屈等7个指标;指标权重模型中,以高抓占有最大权重(0.52),髂宽指数所占权重最小(0.03);另外,不同重量级别之间,肩宽、克托莱指数、高抓、借力推4个指标的差异具有显著性,以重量级最大,中量级次之,轻量级最小。在我国优秀举重运动员体能模型评价体系中,虽然不同性别各重量级别各指标的单项评分标准各不相同,但对其综合评价时,各等级标准相差不大。 相似文献
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山东省优秀男子举重运动员抓举技术动作生物力学分析 总被引：2，自引：0，他引：2
根据定性与定量相结合的原则,采用摄像解析及三维测力相结合的方法,对山东省男子举重队6名运动员的抓举动作进行诊断和评价,为其改进技术动作,提高运动成绩提供参考依据.研究结果表明,抓举过程中杠铃中心点运动轨迹应尽可能成垂直直线向上,S型弧度要小,发力后杠铃应达到一定最大速度,部分优秀运动员下蹲时加速度大于自由落体加速度,杠铃上抛中心点与身高的比值应控制在70%左右.抓举过程中人体膝关节角度曲线成双峰,而髋关节角度曲线为单峰,髋关节不可过早打开,躯干也不可过早用力.抓举整个过程环环相扣,每个阶段的发挥对下一阶段均有重要影响,对抓举的技术分析应采用系统的思考方法. 相似文献
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ABSTRACTThis study examined the weightlifting load effects on the lower extremity coordination pattern during a snatch pull movement. Twenty male elite weightlifters performed snatch trials in each of the three load conditions [light (30%), medium (65%) and heavy (90%) of their maximum weightlifting capacities]. Kinematic data for the transition, second pull and take-off phases of a snatch were collected at 200 Hz using an eight-camera motion capture system. Angle-angle plots and coupling angles were calculated for further analyses. The results indicate that participants utilised knee flexion control-strategy in light and medium load conditions during the transition phase, but not for in-phase strategy in heavy load condition. In the second pull phase, participants utilised concurrent ankle dorsiflexion and knee extension, followed by hip extension strategy. The heavy load condition exhibited the distinct coordination strategies before knee extension. In the take-off phase, light and medium load conditions appeared to use thigh-phase strategy (right ankle-knee: p = 0.788, left: p = 0.035, right knee-hip: p = 0.012, left: p = 0.017, right ankle-hip: p = 0.029, left: p = 0.011). This suggests that the heavy load condition requires the use of two-joint coordination patterns (in-phase or anti-phase) as compared to the other lighter load conditions. 相似文献
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The purpose of this study was to determine the association between weightlifting performance and vertical barbell acceleration patterns. Barbell kinematic time-series data were tracked from 18 snatches from six weightlifters during a regional weightlifting competition. These data were used to calculate vertical barbell accelerations. Time-series data were normalised to 100% of lift phase, defined as the time interval between barbell lift-off and maximum height of the barbell during each snatch lift. The time-series data were then entered into a pattern recognition algorithm that extracted principal patterns and calculated principal pattern scores. Body mass-normalised lift weight, which was used to quantify weightlifting performance, was significantly correlated (r = 0.673; P = 0.033) with a pattern that captured a difference in peak vertical barbell acceleration between the transition and the second pull phase. This correlation indicated that barbell acceleration profiles of higher weight snatch lifts were characterised by smaller decreases in acceleration during the second knee bend and smaller peak acceleration during the second pull phase. Weightlifting coaches and sports scientist should monitor and track vertical acceleration of the barbell, with focus on acceleration profiles that limit (1) deceleration during the transition phase between the first and second pull and (2) peak acceleration during the second pull phase of the snatch. 相似文献
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胡贤豪 《上海体育学院学报》1996,20(3):45-48
采用现场观察、问卷调查与数理统计相结合的方法,对我国高水平女子举重运动员抓挺举大强度训练的效应进行分析。结果表明,不同级别的女子举重运动员,其大强度训练的内容、负荷量与训练效应密切相关。 相似文献