Efficacy of using non-linear pedagogy to support attacking players’ individual learning objectives in elite-youth football: A randomised cross-over trial     

Simon J. Roberts  James R. Rudd  Matthew J. Reeves 《Journal of sports sciences》2020,38(11-12):1454-1464

ABSTRACT

The present study examined the efficacy of a coaching curriculum, based on non-linear pedagogy, on improving attacking players’ individual learning objectives (ILOs) in elite-youth football. Participants included 22 attacking players (i.e., centre-forwards, wide-players and attacking midfield players) from a professional football academy in England. The players were randomly appointed to both control (CON) and intervention (INT) periods following baseline measures. The INT (non-linear) and CON (linear) periods were both designed to support the ILOs provided to each player as part of the elite player performance plan. The study adopted a randomised cross-over design and ILOs considered important for attacking players (i.e., strong foot finishing, weak foot finishing, 1-v-1 and decision-making) were evaluated using the Loughborough Shooting Skill Test. The results showed significant differences for INT in 1-v-1 (P< 0.02) and decision-making (P< 0.01). However, there were no significant differences for strong foot finishing, weak foot finishing or time taken. These results support non-linear pedagogy in developing 1-v-1 game play and decision-making but not for technical shooting proficiency.  相似文献   

The Eton Montem custom c. 1750–1844: privilege,pageantry and sanctioned misrule     

Catherine Dille 《Cultural and Social History》2018,15(3):361-377

Montem, a triennial customary march by Eton scholars, consolidated into a public expression of patrician social identity under the patronage of the monarchy in the late eighteenth century. This analysis of Montem’s history traces its development from a boy-led pageant of misrule to a public performance of elite patriotism. The custom, which attracted national attention, sheds new light on boy governance and self-fashioning in the period’s elite schools. This article argues that a study of Montem disrupts the standard historiographical narrative of anarchy and violence in the great schools and suggests that boy culture was more complex than previously acknowledged.  相似文献   

Association between knee-to-hip flexion ratio during single-leg vertical landings,and strength and range of motion in professional soccer players     

Gustavo Leporace  Marcio Tannure  Gabriel Zeitoune  Leonardo Metsavaht  Moacir Marocolo  Alex Souto Maior 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(3):411-420

Abstract

The aim of this study was to test the correlation between knee-to-hip flexion ratio during a single leg landing task and hip and knee strength, and ankle range of motion. Twenty-four male participants from a professional soccer team performed a continuous single leg jump-landing test during 10s, while lower limb kinematics data were collected using a motion analysis system. After biomechanical testing, maximal isometric hip (abduction, extension, external rotation), knee extension and flexion strength were measured. Maximum ankle dorsiflexion range of motion was assessed statically using the weight bearing lunge test. Pearson correlation coefficients were calculated to determine the associations between the predictor variables (knee and hip strength, and ankle ROM) and the main outcome measure (knee-to-hip flexion ratio). Correlation between knee-to-hip flexion ratio and hip abductors strength was significant (r = ?0.47; p = 0.019). No other significant correlations were observed among the variables (p > 0.05). These results demonstrated that a lower hip abductors strength in male soccer players was correlated with a high knee-to-hip flexion ratio during landing from a single leg jump, potentially increasing knee overload by decreasing energy absorption at the hip. The results provide a novel proposal for the functioning of hip muscles to control knee overload.  相似文献   

核心力量训练在青少年篮球运动员体能训练中的应用研究     

陈彩玉 《当代体育科技》2020,(10):78-79

核心力量训练作为传统力量训练的补充,已经逐渐走入了竞技体育运动训练领域,并取得了理想的应用成效。鉴于此,本文就针对核心力量训练在青少年篮球运动员体能训练中的应用进行了探讨。首先基于对核心力量训练与传统力量训练区别的分析,阐述了核心力量训练在青少年篮球运动员体能训练中的应用价值,然后又进一步梳理归纳了核心力量训练在青少年篮球运动员体能训练中的应用思路,以期能够为青少年篮球运动员体能训练活动的开展提供参考。  相似文献   

关于足球鞋选用的分析     

葛爽 《体育科技文献通报》2020,(5):159-161

在现实的足球运动当中,许多球员(尤指业余爱好者)在球鞋选用方面都存在着一些问题,这十分不利于自我身心健康的发展和球技的有效发挥。为解决这一问题,对于足球鞋选用的理论探析则成为急切的必要条件。本文采用文本分析法和对比观察法,分析了不同特征的球员和各种类型的球鞋情况,认为足球运动员应自觉地根据自身的生理状况和踢球位置等特征来选择与之相适配的"战靴",以便在实际的活动中能够更加充分地发挥自己的驭球技艺,释放自我的运动激情,达成自我实现的目的。  相似文献   

Acrosin activity in spermatozoa of infertile Nigerian males     

M. A. Emokpae  P. O. Uadia 《Indian journal of clinical biochemistry : IJCB》2006,21(1):199-201

The objective of this study was to evaluate acrosin activity in spermatozoa of infertile Nigerian men and to compare with those of the fertile men. The acrosin activity was evaluated using the Acroscreen reagent kit. The acrosin activity of the fertile men was 40.7±5.2 mIU/10⁶ sperm (range 30.1–51.3) and those of the infertile men was 22.4±8.33 mIU/10⁶ sperm (range 5.7–39.1). The difference in the mean was statistically significant (P<0.001). There was a subpopulation of the infertile men who had their acrosin activity within normal range of the fertile men, 32.9±1.57 mIU/10⁶ sperm. But the difference in the mean was statistically significant (P<0.001). Acrosin activity decreased with increased morphological changes in the spermatozoa. It is concluded that acrosin activity in the infertile Nigerian men is significantly lower than that in the fertile men. Acrosin activity may also be affected by morphological changes in the spermatozoa.  相似文献   

ICSI治疗前无精子症患者Y染色体微缺失的筛查分析     

徐晨明  金帆  叶英辉  钱羽力 《科技通报》2004,20(5):455-458

目的　研究ICSI治疗前无精子症患者Y染色体微缺失发生率及微缺失类型,探讨精子生成障碍与Y染色体微缺失的关系.方法　应用PCR技术,对63例ICSI前行诊断性睾丸活检的无精子症患者进行Y染色体15个序列标记位点的微缺失检测.结果　63例无精子症患者中发现12例有Y染色体微缺失,缺失率为19.1%.其中10例患者的缺失发生在AZFc/DAZ区域,缺失率为15.8%;2例患者发生AZFb、AZFc双重缺失,缺失率为3.2%,AZFa无缺失病例.结论　Y染色体微缺失是引起男性无精子症的重要原因之一.采用PCR技术进行微缺失检测是一种非常有效的方法.对无精子症患者进行ICSI治疗前,有必要进行Y染色体的微缺失筛查.  相似文献   

优秀男子长拳类武术套路难度动作发展现状的统计学分析     

陈升 《赣南师范学院学报》2011,32(6):77-80

竞技武术是武术的重要组成部分,是基于传统武术套路发展起来的武术运动.难度动作的完成情况是竞技武术套路竞赛中制胜的关键,采用文献资料法、录像分析法、比较研究法、数理统计法等研究方法,对2010年全国武术套路冠军、2011年全国武术套路锦标赛及2011年全国武术套路冠军赛中长拳、刀、枪、剑、棍共5个项目比赛成绩的前16名,共80名男子运动员在各项目比赛中的难度动作完成情况进行统计分析,对当前国内优秀男子长拳类运动员难度动作选做、扣分情况进行分析,发现竞技长拳类运动员在完成难度动作过程中出现的问题,对其问题解决对策进行分析探讨.旨在为提高竞技武术长拳类项目难度动作成功率提供借鉴和参考.  相似文献   

影响学前教育专业男生职业认同感的因素及教育对策     

陈振 《沙洋师范高等专科学校学报》2008,9(6):55-58

本文采用问卷和访谈的方法对学前教育专业的男生就职业认同感问题展开调查,发现他们的职业认同感较弱。而职业认同感较弱的原因是：传统观念的影响、对自身优势认识不足、性别认同危机和对男幼教的作用认识不到位。  相似文献   

男权意识与鲁迅的文学创作     

曹书文 《河北师范大学学报(哲学社会科学版)》2003,26(1):87-93

在中国现代文学史上，鲁迅一直是站在女性的立场上，对父权社会加诸女性身上各种有形与无形的束缚进行抨击，成为现代妇女解放最热心的倡导者与最坚定的支持者。但作为男权中心社会的一员，他又始终无法摆脱男权意识的传统影响，这既体现在他的文学创作上，又存在于他的情感生活之中。  相似文献