对标枪训练中肘部损伤的探讨

标枪训练中肘部损伤是极为常见的,本文从肘部的解剖结构形式和错误的投掷技术等方面阐述了造成损伤的机制,并提出相应的预防措施,以便进一步减少损伤的发生,促进动作要领的掌握和运动成绩的提高。     

论我国散手技术特色及其发展趋向

通过对散手运动的考察,技术单一是阻碍该项目发展的重要因素,改进技术方法,突出竞技特色,进一步吸取中国传统武术技法技巧是完善和发展散手运动的有效途径,在此基础上的未来散手竞技无论从技术上、形式上一定会出现新的飞跃和提高.     

An evaluation of biomechanical measures of bowling action legality in cricket

Cricket bowling is traditionally thought to be a rigid-arm motion, allowing no elbow straightening during the delivery phase. Conversely, research has shown that a perfectly rigid arm through delivery is practically unattainable, which has led to rule changes over the past years. The current rule requires a bowler not to increase the elbow angle by more than 15°, thus requiring a measurement to confirm legality in “suspect” bowlers. The aims of this study were to evaluate whether the current rule is maintained over a range of bowlers and bowling styles, and to ascertain whether other kinematics measures may better differentiate between legal and suspect bowling actions. Eighty-three bowlers of varying pace were analysed using reflective markers and a high-speed (240 Hz) eight-camera motion analysis system in a laboratory. The change in elbow segment angle (minimum angle between the arm and forearm), the change in elbow extension angle with respect to the flexion–extension axis of a joint coordinate system, and the elbow extension angular velocity at ball release were measured. We found that bowlers generally bowled within a change in elbow extension angle of 15°. However, this limit was unable to differentiate groups of bowlers from those who were suspected of throwing in the past. Improved differentiation was attained using the elbow extension angular velocity at ball release. The elbow extension angular velocity at ball release may be conceptually more valid than the elbow extension angle in determining which bowlers use the velocity-contributing mechanisms of a throw. Also, a high value of elbow extension angular velocity at ball release may be related to the visual impression of throwing. Therefore, it is recommended that researchers and cricket legislators examine the feasibility of specifying a limit to the elbow extension angular velocity at ball release to determine bowling legality.     

散打运动员肘关节的等速肌力研究

采用ISOMED2000等速力量测试系统对优秀散打运动员和一般散打运动员肘关节进行不同速度的等速肌力测试.测试速度依次为10°/s、60°/s、180°/s和360°/s,选取屈肌肌群、伸肌肌群的峰值力矩、峰值力矩体重比、屈伸肌比值、峰力矩角度、平均功率、总功作为指标,对运动员的肘关节肌肉力量进行研究,比较分析不同速度下肘关节屈伸肌群的力学特征变化.结果显示,优秀运动员无论绝对力量、相对力量还是爆发力都高于一般运动员,优秀运动员在60°/s速度时峰力矩、相对峰力矩和做功最大,但优秀运动员的伸肌力量明显大于屈肌力量,可能出现关节不稳定.     

高校网球选修班学生网球肘的预防和治疗

网球运动在许多高校我都被列为专选课,受到广大师生的喜爱.但由于学生在练习中技术动作的不正确和球拍较硬,引发了网球时.本文对网球肘的病因进行了探讨和阐述,为广大师生对网球肘预防、治疗和康复提供一些建设性的意见.     

语言强化刺激对篮球原地投篮技术动作教学效果的研究

采用等级实验法，对原地投篮技术动作教学过程进行实验和对照比较，证实语言强化刺激能有效提高原地投篮技术动作教学效果，并提供了理论依据．     

肘关节屈伸肌群等速肌力的测定与分析

为了解肘关节屈、伸肌群在不同收缩方式、不同运动速度、不同关节角度时力矩变化情况。为运动医学、临床医学、康复医学的实践提供参考,用BIODEX等速测力及康复系统,测定了北京体育大学体育生物科学系9名男生肘关节屈、伸肌群静力和等速向心、等速离心不同运动速度的肌力。结果为：肘关节屈、伸肌群最大力矩与肌肉收缩方式的关系符合一般规律,即离心收缩大于静力收缩,静力收缩又大于向心收缩。肘关节屈、伸肌群最大力矩,在收缩速度为60°～120°／s范围内．无明显差异,可选为慢速测试速度。如测定快速肌力,速度至少提高到180°／s以上。肘关节屈／伸肌群力矩比率均值＞1,即屈肌肌力大手伸肌肌力,但个体差异较大。并根据肘关节屈、伸肌群力矩、最大力矩与关节角度的关系,提出进行直立位屈肘力量练习时,可取肩关节屈曲10°～20°用的位置;进行伸肘肌群力量练习时,可采取直立位头后上举的抗阻练习。     

钢琴教学中的基本弹奏技能

在钢琴的弹奏技能中，手指到掌关节的支撑直接影响弹奏过程中音色的质量．手腕是从手臂到手指之间的桥梁并且具有调节作用，肘部在弹奏过程中有着中介作用，手臂运用自然重量来弹奏极其重要．并且能想像出弹奏的音色，让身体利用原理产生必要的动作，在钢琴弹奏中使之能成为音乐意愿的表现。     

弯管流量计现场应用需注意的几个问题

简要介绍弯管流量计的工作原理及特点，分析了弯管流量计在现场应用中易出现的问题。使用户对弯管流量计的选型、安装和使用方面更加方便。有利于推动弯管流量计在工业流量计量的应用。     

应用电针配合推拿以及功能锻炼治疗网球肘26例报告

网球肘又称肱骨外上髁炎,是肘关节外上髁局限性疼痛,并影响伸腕和前臂旋转功能的劳损性疾病.采用电针配合推拿以及功能锻炼方法治疗本病26例,疗效显著,现予以介绍.