立定跳远教学中TGMD-2的应用研究

目的:对立定跳远教学进行干预,采用儿童大肌肉群动作发展测试量表(以下简称TGMD-2量表)进行过程性测量,观察干预教学对儿童立定跳远动作发展的影响,寻求发展儿童下肢大肌肉群的有效途径。方法:1)干预前后使用TGMD-2量表对学生立定跳远动作进行评分,并测量远度,进行比较;2)对实验组立定跳远教学进行干预,对照组不做干预。结果:实验组立定跳远评分与远度测量显著提高;对照组评分显著下降,远度测量上升。结论:1)运动干预可以促进儿童立定跳远动作发展;2)儿童动作发展成熟之前可采用TGMD-2量表进行过程性评价。     

提高跳远助跑的准确性

本对我院67名体育系学生的随堂测试的数据进行分析和研究，找出影响跳远助跑准确性的主要因素以及改进方法，从而提高教学质量。     

Force–velocity property of leg muscles in individuals of different level of physical fitness

The present study explored the method of testing muscle mechanical properties through the linear force–velocity (F–V) relationships obtained from loaded vertical jumps. Specifically, we hypothesised that the F–V relationship parameters depicting the force, power, and velocity of the tested muscles will differ among individuals of different physical fitness. Strength trained, physically active, and sedentary male participants (N = 10 + 10 + 10; age 20–29 years) were tested on maximum countermovement and squat jumps where manipulation of external loads provided a range of F and V data. The observed F–V relationships of the tested leg muscles were approximately linear and mainly strong (median correlation coefficients ranged from 0.77 to 0.92; all p < 0.05), independently of either the tested group or the jump type. The maximum power revealed higher values in the strength trained than in the physically active and sedentary participants. This difference originated from the differences in F-intercepts, rather than from the V-intercepts. We conclude that the observed parameters could be sensitive enough to detect the differences among both the individuals of different physical fitness and various jump types. The present findings support using loaded vertical jumps and, possibly, other maximum performance multi-joint movements for the assessment of mechanical properties of active muscles.     

Physical activity profiles and selected muscular fitness variables in English schoolchildren: A north–south divide?

The aim of the study was to compare and contrast habitual physical activity (PA) profiles and muscular fitness in schoolchildren from northern and southern regions of England. Data were collected from two secondary schools in the north east (NE) of England. The study procedures followed methods employed by the East of England Healthy Hearts Study in 10–16-year-old boys and girls based in the south east (SE) region of England and data were compared. Habitual physical activity (PAQ-A), vertical jump test, and hand-grip (HG) strength were assessed. We converted raw scores from all assessments to age- and sex-normalised z-scores. We recruited 597 children (58% boys) in the NE and compared findings to 597 age- and sex-matched boys and girls from the SE. Boys in the SE had significantly stronger HG scores, jumped higher, were more powerful (mean peak power: 2131?W vs. 1782?W; P?P?P?相似文献   

分光计调节的一种简易方法

分光计的调节是光学实验中的一大难题.本文对分光计调节中出现的一些现象进行分析,并提出了简便而又快速的调节方法.     

背越式跳高中助跑与起跳结合的重要性

背越式跳高中助跑与起跳的紧密结合对跳高成绩起着十分重要的作用．通过运动力学、解剖学分析和动作技能形成过程中的心理特点分析，对助跑起跳学习环节加大重视，多做有关的辅助练习，形成正确规范的技术动作，有助于学生更快更好地提高运动成绩．     

论运动技能形成和竞技成绩的起伏与高原现象--用正确理念评价我国乒乓球运动员技术水平与竞技成绩

任何运动技能训练或运动成绩与时间周期,大多呈S型或波浪式曲线,时而上升,时而下降,这是符合运动技能形成过程的普遍规律。只有科学地运用这一理念,才能成功地指导我国乒乓球运动训练与比赛。我国乒乓球队之所以长盛不衰,正是充分地掌握这一客观规律,致使我国乒乓球事业处于主导地位,捍卫了国球的荣誉。     

田径技术教学方法探讨——关于“跳远逆进教学法”的讨论

本文针对“跳远逆进教学法”提出的问题,根据跳远教材的特点和各技术环节之间的关系,指出跳远教学不宜采用“逆进分解教学法”,而应该采用“顺进分解教学法”。     

对跳远起跳时几个不同角度之间关系的研究

对跳远起跳时的几个不同角度进行了分析．研究了着地角，扇面角，缓冲膝角及蹬地角之间的关系。及其对助跑和腾空动作过程的制约作用，对教练员评价和诊断技术动作有重要的参考价值．     

我校撑竿跳高运动员的训练

总结我校两届学生撑竿跳高训练的经验,对于初次接触撑竿跳高运动且经短时间训练就参加比赛的运动员,如何进行训练更能适应省大运会比赛的要求,并取得较好成绩进行了有益的尝试。