健美操训练对女大学生踝关节力觉影响的实验研究     

陈瑞琴  ;林辉  ;张秋霞 《四川体育科学》2014,(4):36-39

健美操是在音乐的伴奏下,以身体练习为基本手段、以有氧运动为基础,达到增进健康、塑造形体和娱乐目的的一项体育运动。健美操最重要的技术是弹动技术,主要是依靠踝、膝、髋关节的屈伸缓冲而产生,减少运动对关节的冲力,从而减少对人体造成的损伤。踝关节本体感觉能力的增加,可提高踝关节周围神经肌肉控制能力,使踝关节在弹动、跳跃落地时保持身体的协调稳定,控制整个身体姿态,达到美化动作,提高运动技术水平的能力。本研究以健美操训练对女大学生踝关节力觉影响的实验研究为研究对象,旨在探讨健美操运动对踝关节的力觉各指标的影响,为减少踝关节运动损伤的发生和健美操的教学训练、比赛提供一定的理论依据。  相似文献   

Effect of chainring ovality on joint power during cycling at different workloads and cadences     

Gerda Strutzenberger  Tobias Wunsch  Josef Kroell  Jacqueline Dastl  Hermann Schwameder 《Sports biomechanics / International Society of Biomechanics in Sports》2014,13(2):97-108

Non-circular chainrings theoretically enhance cycling performance by increasing effective chainring diameter and varying crank velocity, but research has failed to consistently reproduce the benefits in cycling trials. The aim of this study was (1) to investigate the effect of different chainring shapes on sagittal knee joint moment and sagittal lower limb joint powers and (2) to investigate whether alterations are affected by cadence and workload. Fourteen elite cyclists cycled in six conditions (70, 90 and 110 rpm, each at 180 and 300 W), for 2 min each, using three chainrings of different ovalities (1.0–1.215). Kinematic data and pedal forces were collected. For most conditions, only the chainring with the highest ovality (1.215) was characterised by smaller sagittal knee joint moments, smaller relative sagittal knee joint power contribution and larger relative sagittal hip joint power contribution, which suggests a change from maximising efficiency to maximising power production. Effect sizes increased with higher cadences, but not with higher workload. This study has application for athletes, clinicians and sports equipment industry as a non-circular chainring can change joint-specific power generation and decrease knee joint moment, but certain ovality seems to be necessary to provoke this effect.  相似文献   

Comparison of support leg kinetics between side-step and cross-step cutting techniques     

Yuta Suzuki  Michiyoshi Ae  Shunsuke Takenaka  Norihisa Fujii 《Sports biomechanics / International Society of Biomechanics in Sports》2014,13(2):144-153

The purpose of this study was to investigate differences in the support leg joint moment and moment power between side-step (SS) and cross-step (CS) cutting techniques with a prescribed 90° cutting angle. Ground reaction forces (1,000 Hz) and three-dimensional kinematics (250 Hz) of SS and CS cutting techniques were collected from 20 male college athletes. Normalised peak knee extension moment was larger in the SS technique than in the CS technique (0.40 ± 0.10 in SS; 0.26 ± 0.08 in CS). In the SS technique, the knee extensors ( ? 0.10 ± 0.06 in SS; ? 0.02 ± 0.04 in CS) and ankle plantarflexors ( ? 0.12 ± 0.05 in SS; ? 0.07 ± 0.03 in CS) did significantly more negative work (normalised). The direction change angle (40.5 ± 8.7° in SS; 33.0 ± 6.8° in CS) and the decrease in horizontal velocity of the centre of mass ( ? 0.63 ± 0.23 m/s in SS; ? 0.31 ± 0.23 m/s in CS) were significantly larger in the SS technique. These results suggest that the SS technique is an effective means of changing running direction at the expense of velocity of the centre of mass and that the CS technique is better for minimising the reduction in horizontal velocity of the centre of mass.  相似文献   

运动性膝关节损伤的临床康复   总被引：3，自引：0，他引：3  

李静 《武汉体育学院学报》2004,38(5):67-68

针对膝关节不稳定性损伤的不同状态,对不同运动强度,不同运动开始时间在损伤康复研究中的价值进行比较研究,为运动性膝关节损伤的临床康复提供参考。  相似文献   

散打运动员膝关节损伤研究     

吴金荣  罗畅伟 《搏击·武术科学》2008,5(10)

文章采用文献资料法、问卷调查法、专家访谈法等方法,以广州体育学院散打队队员为研究对象,对武术散打运动中膝关节损伤及其防治的情况进行了研究,发现了导致膝关节损伤产生的原因、损伤的性质、训练年限与损伤的关系和诊断治疗以及预防措施等,并在此基础上提出合理、科学的防治膝关节损伤的方法和建议。以引起教练员和运动员对膝关节损伤及其防治情况的重视,从而减少其发病率,保证我国散打运动健康稳步发展。  相似文献   

手法治疗158例胸椎小关节紊乱的临床分析     

张钢林 《山西师大体育学院学报》1997,(2)

本文对158例胸椎小关节紊乱患者进行了病因诊断及手法机理的临床探讨,提出了胸椎突然旋转外力是导致该症的病因。其临床症状复杂,主要是由于小关节紊乱或滑膜嵌顿引起的局部炎症和刺激植物神经的结果。手法治疗效果显著,简单实用。  相似文献   

提高合并高样图书馆办馆效益的思考   总被引：11，自引：1，他引：10  

唐秀群 《图书馆论坛》2001,20(1):22-24

高校图书馆合并后已取得了初步效益，但仍存在一些问题，如何解决这些问题以实现合并办馆的最大效益，更好地为高校提供信息服务，以达到高校合并改革之目的，值得深入思考。  相似文献   

中国男篮在身体接触情况下背向进攻的特征   总被引：5，自引：0，他引：5  

周威  董伦红  熊国庆 《体育学刊》2001,8(3):32-34

通过对NBA总决赛、奥运会队及CBA比赛某些场次的背向进攻方式，脚步动作，投篮方法等研究，指出我国国家队和甲级队在比赛中有身体拉触的投篮次数占总数的比率少，对抗投篮得分占总得分的比率较低，队员主动进攻能力差等问题，为篮球科学训练提供理论依据和参考：  相似文献   

Chinese business students’ changes in beliefs and strategy use in a constructively aligned PBL course     

Ke Zhao  Jie Zhang  Xiangyun Du 《Teaching in Higher Education》2017,22(7):785-804

This study adopted a longitudinal retrospective case study approach to investigate Chinese business students’ transitional learning experience in a problem-based learning (PBL) course with innovative assessment practices. The study focused on students’ beliefs and strategy use in a constructively aligned PBL course for business communication. Eight students who had made notable progress were chosen for retrospective analysis. The data included 48 journal entries, interviews, and writing samples collected at different stages of the course. This study identified taxonomies of participants’ beliefs about learning and writing, their perceptions of assessment, and their strategy use for learning. It also examined changes in beliefs, perceptions, and strategy use to determine the nature of the students’ learning experience in this PBL course. Findings suggest a recognised need to design PBL courses that align social constructivist learning principles with students’ beliefs and strategies. The results also highlight the importance of developing appropriate assessment rubrics to enhance student engagement with PBL learning for improved outcomes.  相似文献   

联合共享的King图书馆集成管理实践研究     

胡维青 《情报科学》2007,25(6):844-847

本文介绍了联合共享的King图书馆产生的背景、重组后的组织机构以及IT部门是如何实现集成的，归纳出King图书馆机构重组和集成IT管理带给我们的启示。  相似文献