The effect of limb dominance on lower limb functional performance – a systematic review

Lower limb dominance (or lateral preference) could potentially effect functional performance. Clinicians are often asked to make judgements as to when a patient has sufficiently “recovered” from an injury, typically using strength and dynamic performance outcome measures. The primary purpose of this study was to systematically review the literature in relation to limb dominance within active adult populations and discuss some limitations to current methods and relate this to current clinical practice. A search of MEDLINE and CINAHL and EMBASE databases and reference lists of those articles identified was performed. Eleven articles were selected for meta-analysis. There was no statistical effect of limb dominance for any of the functional tests: isokinetic quadriceps and hamstring tests, hamstring:quadriceps ratios, single-leg hop for distance, single-leg vertical jump and vertical ground reaction force following a single-leg vertical jump. Pooled symmetry values varied from 94.6% to 99.6% across the tests, above the clinically accepted benchmark of 90% used in clinical practice. Although the results of this study must be used with discretion, asymmetries in the tasks described in this analysis should be viewed as undesirable and remedied accordingly. Further research is needed to quantify asymmetries, particularly in relation to sport-specific contexts.     

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。     

电力变压器离线局部放电测量试验中的容升现象分析

Partial discharge test on a transformer is carried out according to the items in IEC 60.During the test,unproved measuring system is calibrated by proved system at a voltage no less than 50% the rated testing voltage.The result is then extrapolated linearly,leading to an error related to the distribution of stray capacitance,which varies with the testing frequency,especially to large transformers.In this paper a factor,named the capacitive rise fact,is introduced to assess the rise.The factor can be adjusted to some extent by changing the reactance that is connected to the LV side of the testing circuit to lower the capacity of the power source.However,the factor changes when the voltage divider on the high voltage side is removed after the voltage ratio has been calculated,and a great error is resulted under unfavorable conditions.     

建筑风景画的美学品格与文法范式

建筑风景绘画样式除了各种表现策略外,还有自身的文法范式及构成它自身的表意元素.学习和掌握建筑风景画,有利于提高建筑表现图画的专业表达能力;通过准确反映甚至强化建筑设计意图,增强对建筑、自然的了解,可为建筑设计积累专业素材和专业养分.在绘画表现中,真正掌握建筑风景画的文法范式,对提高建筑风景的审美品格与价值有着十分重要的现实意义.     

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   

遵义方言量词的重叠

遵义方言量词的构形重叠有三种形式：完全重叠式AA、嵌“大”重叠式“A大A”和嵌“把”重叠式“A把A”，前一种和普通话相同，后两种则为遵义方言所特有。本文讨论各重叠形式的语法意义及句法功能。     

高职院校校内英语测试的思考

测试是衡量学生掌握语言的能力的手段。目前高职院校校内的英语测试存在着一定的缺陷,制约了学生的英语实际应用能力的培养。只有对院校内的英语测试模式进行完善,才能真正测试出学生的实际应用能力,才能对学生实际应用能力的培养起到促进的作用。     

EWB在《电路分析》课程教学中的应用

电路分析是一门很重要的专业基础课,而利用EWB软件进行教学及模拟实验仿真可以提高学生的学习兴趣,让学生更直观的掌握电路分析的基本理论,更有利于培养学生的实践技能和创新能力,本文就如何在<电路分析>课程教学中应用EWB软件辅助教学进行探讨.     

试论清真词艺术形式追求的意义

周邦彦的格律词对后世产生了深远的影响，同时也引来了种种的非议。本以北宋后期的时代和创作倾向为背景，结合词的发展及周邦彦的具体创作，阐述了清真词的艺术成就及其对于艺术形式追求的必然性和必要性。     

关于艺术院校学生普通话水平测试的几点思考

艺术院校的学生,特别是有专门台词课、表演课的影视表演、播音主持专业的艺术类学生,普通话水平测试的结果并不理想,达到一级水平的学生并不多。有的学生甚至怀疑普通话水平测试的信度和效度。文章针对这种情况,从口语的吐字归音入手,通过对台词教学与普通话水平测试的评价标准和要求的分析提出应试者(学生)要端正认识,掌握标准。参加普通话水平测试要按照普通话的标准说普通话,注意吐字归音从“神似”回归到“形似”。要经过严格的正音训练或参加普通话培训,在辅导老师的指导下,对自己准确定位,认真练习准备,建立起真实的自信,以顺利地通过普通话水平测试,进入“形”“神”兼备的语言艺术境界。