Clap冰刀与传统冰刀蹬冰机制比较

通过对clap式冰刀与传统冰刀蹬冰机制的比较得出，clap式冰刀蹬冰技术原理体现在两个方面：一是通过提高踝关节的灵活性来改变下肢各关节的发力性质；二是通过冰刀结构的改变来揭示速滑蹬冰技术动作加速理论的适用条件。其核心是提高踝关节的灵活性。     

关于中国男篮实施"快速灵活"战术的分析

"快速灵活"是一种既调速度又注重战术灵活变化的打法,中国男篮正在失去这一传统特长和优势.文章分析了中国男篮"快速灵活"打法的一些基本要素,并提出了对策和建议:加强跑动中传接球,运球突破的基本功的练习;培养高水平的快攻队员;丰富战术体系;提高队员身体素质.     

健美操专项柔韧素质训练方法实验比较研究

为了探索高校健美操专修学生柔韧素质发展的有效训练方法,结合健美操项目柔韧素质的特点,采用4种柔韧素质练习方法进行小组对比实验,得出PNF牵拉法是高校健美操运动4种训练方法中发展柔韧素质的最佳方法,其次是动静结合拉伸法,而单纯静力性拉伸法和单纯动力性拉伸法的效果相对较差。     

Prolonged static stretching does not influence running economy despite changes in neuromuscular function

Abstract

The aim of this study was to examine the acute effects of prolonged static stretching (SS) on running economy. Ten male runners ([Vdot]O_2peak 60.1 ± 7.3 ml · kg^?1 · min^?1) performed 10 min of treadmill running at 70%[Vdot]O_2peak before and after SS and no stretching interventions. For the stretching intervention, each leg was stretched unilaterally for 40 s with each of eight different exercises and this was repeated three times. Respiratory gas exchange was measured throughout the running exercise with an automated gas analysis system. On a separate day, participants were tested for sit and reach range of motion, isometric strength and countermovement jump height before and after SS. The oxygen uptake, minute ventilation, energy expenditure, respiratory exchange ratio and heart rate responses to running were unaffected by the stretching intervention. This was despite a significant effect of SS on neuromuscular function (sit and reach range of motion, +2.7 ± 0.6 cm; isometric strength, ?5.6% ± 3.4%; countermovement jump height ?5.5% ± 3.4%; all P < 0.05). The results suggest that prolonged SS does not influence running economy despite changes in neuromuscular function.     

The relationships between hamstring flexibility,lumbar flexion,and low back pain in rowers

Abstract

In this study, we examined the relationships between low back pain, hamstring flexibility, and lumbar flexion in rowers. Twenty-six male university rowers participated. Hamstring flexibility was assessed using an adjusted straight leg raise technique, and lumbar flexion was assessed via a distraction of skin marks protocol while long sitting. A questionnaire ascertained rowing details and low back pain characteristics. Low back pain was highly prevalent. No association was observed between low back pain and hamstring flexibility, or between hamstring flexibility and lumbar flexion. Sufferers of low back pain showed reduced lumbar flexion (P=0.03; 95% confidence interval = ? 3.7 to ?0.2). Results obtained using the adjusted straight leg raise technique suggested that low back pain was not associated with hamstring inflexibility, which suggests that increasing hamstring flexibility for rehabilitation or prevention of low back pain in rowers might not be necessary.     

功能动作测试在中学生基本运动能力评价中的应用

目的：采用功能性动作测试系统（Functional Movement Screen,FMS）评价青少年在完成不同功能动作模式时身体各部分的稳定性、对称性和灵活性,研究其基本运动能力及影响因素。方法：以上海市某中学中随机挑选的100名初中生为研究对象,对他们进行7个特定动作的测试并评分,并对测试结果进行统计分析。结果：FMS测试总分满分为21,受试对象FMS总分均分为14.89,总体水平偏低;女生肩关节灵活性和直腿抬高测试得分显著高于男生,但总分上男女生无显著差异;青少年在完成动作时普遍存在身体晃动、力量不足和两侧肌力不对称现象,髋、膝、踝关节灵活性受限且稳定性较差,脊柱的屈伸能力不足,两侧盂肱关节和髋关节的活动能力不对称。在旋转稳定性、跨栏架和直线弓箭步３个测试中这些不足尤为明显。结论：青少年基本运动能力水平较低,大多数人需要进行矫正训练;男女生总体上的表现差异不显著,但女生在肩部灵活性和直腿抬高测试的表现要优于男生,故男生需加强肩部和髋部关节的灵活性锻炼。     

形体整合内容对女大学生柔韧性及心境状态的影响

采用BFS心境量表和柔韧性测试手段,通过实验对比的方法,研究形体整合内容对女大学生柔韧性及心境状态的影响。结果表明：形体整合内容能够有效地提高学生的柔韧性,改善心境状态,促进心理健康,在一定程度上支持了心境的动力平衡理论。     

体育与健康课程标准的约束力与灵活性

课程标准灵活性增强,是新一轮学校体育与健康课程改革的前提和基础。但《课程标准》是国家教育行政部门颁布的规范和指导教学的纲领性文件,还必须具有约束力。从当前基础教育《体育与健康课程标准》的实施现状来看:强化国家、地方、学校三级课程管理制度,建立地方体育课程教学指导大纲,强化体育与健康课程标准的权威性,严肃执行课程标准的纪律,势在必行。     

少年武术运动员柔韧性训练的研究

武术运动员的柔韧性是非常重要的，它决定着武术运动员妁成绩好坏以及今后的发展方向。如果柔韧性不够好，掌握动作技能的过程会立即缓慢下来，并变得复杂化，而其中某些对完成比赛动作十分重要的关键技术往往不可能学会。关节灵活性差会限制力量、速度和协调能力的发挥，降低肌肉群内和肌肉群间的协调性，是导致肌肉、韧带损伤的原因之一。     

组织忘记对企业二元创新平衡的影响研究

构建一个有调节的中介模型,分析组织忘记对企业二元创新平衡的影响,以及战略柔性和企业规模在以上关系中所起的中介和调节作用,并通过271份有效的问卷调查数据进行实证检验。运用SPSSPROCESS宏程序(3.3版本)进行回归分析,发现组织忘记对企业二元创新平衡的直接效应和间接效应同时存在,战略柔性的两个维度-资源柔性和协调柔性在二者之间均起到中介作用,企业规模在组织忘记与战略柔性的两个维度间起着调节作用。研究结果不仅为二元创新平衡的研究开辟了新的视角,同时对中国企业提升二元创新平衡具有现实指导意义。