共查询到20条相似文献,搜索用时 0 毫秒
1.
不同快慢节奏对连续性原地纵跳影响的实验研究 总被引:1,自引:0,他引:1
单信海 《天津体育学院学报》2007,22(3):228-230
采用录像和测力同步测试的方法,对10名受试者以80、120、160次,min3种不同节奏的连续性原地纵跳动作进行实验测试,结果表明:随着节奏的加快.支撑时间显著缩短;人体腾空的高度、质心下降与上升的最大速度等有显著性的下降;踝、膝、髋3个关节的屈曲程度,膝关节的伸屈角速度都有显著地下降;人体的刚度系数变大,弹性变小。 相似文献
2.
3.
篮球运动中制空权的掌握并不仅仅在于对空间高度的控制,还在于对高度控制的持续时间上,因而连续起跳就显得颇为重要;对篮球运动中连接起跳技术的结构、运用及影响因素进行了探讨,并设计了相应的训练方法。 相似文献
4.
5.
6.
7.
运用Vicon运动影像捕捉分析系统,对运动训练专业二级运动员原地纵跳、半蹲跳及不同高度下落跳深动作进行采集与三维重构,运用V3D系统完成身体质心位置坐标计算。依据肌肉收缩理论,借鉴前人对肌肉弹性能利用的计算方法,对受试者不同高度下落跳深的弹性能利用率进行测试分析。结果表明:一般水平的运动员跳深练习中肌肉弹性能利用率,随着下落高度的增加,表现出"增大—峰值—下降"的单峰波特征,最大利用率大约出现在40 cm的下落高度;原地纵跳练习的肌肉弹性能利用率与跳深练习的最大利用率相接近;仅就肌肉弹性能的利用方面,原地纵跳是一种较好的训练方法。 相似文献
8.
我国优秀男子跳远运动员起跳中不同时相速度变化特征 总被引:4,自引:0,他引:4
采用现场定点高速摄影、影片解析及数理统计等研究方法。结果表明,我国优秀男子跳远运动员起跳缓冲阶段,身体重心水平速度减小,并与垂直速度增加之间存在密切关系;蹬伸阶段身体重心水平速度略有回升,垂直速度保持增加的态势,且离板瞬间身体重心水平速度和垂直速度都呈现出相对较大的趋势。 相似文献
9.
Gavin L. Moir 《Measurement in physical education and exercise science》2013,17(4):207-218
The purpose of the present study was to investigate the effects of different methods to calculate vertical jump height in men and women. Fifty men and 50 women performed three countermovement vertical jumps for maximal height on a force platform, the highest of which was used in the statistical analyses. The peak displacement attained by the center of mass (COM) during flight was obtained from three different calculations: (1) using the time in the air (TIA), (2) using the vertical velocity of the COM at take-off (TOV), and (3) adding the positive vertical displacement of the COM prior to take-off to the height calculated using TOV (TOV+s). With all calculations, men produced significantly greater jump heights than women (p < 0.05). TIA produced significantly greater jump heights than TOV in men and women, while TOV+s produced significantly greater jump heights than both TIA and TOV in men and women (p < 0.05). Despite these differences, the methods produced consistent results for both men and women. All calculation methods have logical validity, depending upon the definition of jump height used. Therefore, the method used to calculate jump height should be determined by the equipment available to the practitioner while giving consideration to the sources of error inherent in each method. Based upon the present findings, when using a force platform to calculate vertical jump height, practitioners are encouraged to use the TOV method. 相似文献
10.
跳远起跳效果评价指标分析 总被引:4,自引:0,他引:4
本文采用解析法与运动生物力学等研究方法,指出用起跳时间、水平速度损失率两项指标评价起跳效果的不足,提出了蹬伸时间指数和水平速度转化率两项新的综合指标,并对新指标的应用进行了分析。 相似文献
11.
佟胜志 《哈尔滨体育学院学报》2005,23(3)
在影响跳远成绩诸多因素中,起跳技术是各个环节中一个非常重要的关键技术。就起跳技术及起跳腿对跳远运动员创造成绩所发挥的作用,在理论与实践中加以探究,并提出一些训练建议。 相似文献
12.
13.
14.
以我国不同级别男子跳远运动员48名为研究对象,运动员运动等级为健将级、一级、二级各16名,运用文献资料法、问卷调查法、因子分析法、逐步回归分析法、多元回归分析法、数学建模法建立预测专项成绩的专项力量指标方程.结果表明:我不同级别的运动员预测专项成绩的专项力量指标存在差异性,各预测模型均可作为预测该级别运动员的专项力量水平模型. 相似文献
15.
世界男子三级跳远技术现状及发展趋势的研究 总被引:4,自引:0,他引:4
基于世界20名优秀三级跳远的男运动员资料,总结了不同阶段世界男子三级跳远的技术,归纳了男子三级跳远技术可分为4种类型,分别是自由式,高跳型、平跳型和速度-平跳型.文章还提出了世界男子三级跳远发展的新趋势. 相似文献
16.
从肌肉的生理特性、力学原理、运动学等理论角度分析,指出支撑脚在着地瞬间应该增大地面支撑反作用力而不是减小或克服它;增大地面支撑反作用力有利于重心水平速度的提高。 相似文献
17.
对不同等级三级跳远运动员身体训练水平的检查与评定 总被引:3,自引:0,他引:3
对我国健将、一级、二级共48名三级跳远运动员12项素质指标进行了测试,在用美国TSP统计程序对数据进行处理之前,对各项素质进行了方差分析。从而建立了三种级别运动员身体训练水平的回归方程,制订了身体训练水平的评分标准,以及检查性项目综合发展水平、均衡程度、与专项的适应程度评定方法。为教练员制订训练计划、控制训练过程和预测运动成绩提供参考。 相似文献
18.
Calvin P. Garbin Elba G. Stafford Carla D. Lowry 《Research quarterly for exercise and sport》2013,84(1):14-20
Abstract The present study examines the utility of several objective measures to predict which girls were selected for one of six junior high school basketball teams. One purpose of this research was to examine the extent to which differences between coaches' selection strategies might have contributed to the apparently contradictory results among previous attempts to identify correlates of coaches' ratings or team selections. Linear discriminant models of six coaches' team selections were constructed from measures of basketball and athletic skills, strength, physical measures, and competition anxiety obtained during the first week of practice. These models provided greater-than-chance agreement with coaches' player selection for each team (87%–93% correct classification). A cross-modeling procedure revealed that the six coaches' selections could be modeled in terms of one of three approaches to selection: a) Select the aspirants who possess the best basketball skills (three teams), b) select the aspirants with greatest size and strength and least competition anxiety (two teams), and c) select only the aspirants with both types of attributes (one team). The results indicate that it may be difficult to identify a single set of measures to select skillful or potentially skillful basketball players, because of differences in how coaches might choose to define these terms 相似文献
19.
Linda J. Duffy Anders K. Ericsson Bahman Baluch 《Research quarterly for exercise and sport》2013,84(2):71-78
Contemporary accounts of sex differences in perceptual-motor performance differ in their emphasis on nature and nurture. Study 1 examined the effect of extensive training on one of the largest sex differences, namely accuracy in dart throwing, and found that physical differences in height and reach could not explain sex differences in regional/national level dart players. Study 2 rejected accounts of sex differences based on participation rates by showing that male players recruited from a relatively small pool of club players were superior to the best female players selected from a much larger pool at the international level. Alternative accounts of the source of sex differences in darts, based on male and female players' differential development and practice histories, are discussed. 相似文献
20.
李世明 《山东体育学院学报》2004,20(3):54-56
通过对沙滩、室内排球同一上步扣球起跳动作进行运动学、动力学同步数据采集,比较了二的力、冲量及功率等指标,得出如下结论:1)沙滩排球扣球起跳蹬伸阶段下肢肌群爆发力的发挥水平远远低于室内排球,不利于增大蹬伸冲量的积累;2)分析起跳冲量的内部结构发现。沙滩排球扣球起跳的蹬伸冲量远小于室内排球,从而致使沙滩起跳的恢复系数小于室内的;3)沙滩排球起跳的速度力量水平发挥远低于室内排球是在沙滩上起跳效果差的主要影响因素。 相似文献