体育产业化驱动力:一个规范解释   总被引：9，自引：3，他引：6  

程林林 《成都体育学院学报》2004,30(1):22-25

处于二元经济结构和转轨经济的背景下,城市化是体育产业化的载体.增加休闲时间、提高体育产业长期增长率、改变传统文化习俗或鼓励资本的横向进入等所导致的直接结果是改善资源在体育产业化进程中的配置效率,从而形成体育产业化的驱动力.  相似文献   

试析水泥场地上运动的利弊及对策     

严兆廉 《体育科学》1996,(4)

针对在水泥场地上进行体育运动的利弊进行分析,并提出相应的对策措施,以保护青少年健康,保证体育运动安全顺利地开展。  相似文献   

肌肉力量连续统一体理论及其在力量训练中的应用研究   总被引：2，自引：0，他引：2  

臧秋华 《沈阳体育学院学报》2005,24(4):76-78

通过对肌肉力量中主动张力和被动张力的关系所作的深入探讨,认为肌肉在不同收缩形式和收缩速度下,肌力的组成以及各组成成分之间既相互区别又相互联系,形成一个连续统一体。这为力量训练理论与实践研究开辟了新的思路。  相似文献   

图书馆国际化的内涵、动因及对我国的启示   总被引：2，自引：0，他引：2  

胡俊荣  聂建霞 《图书与情报》2006,(4):6-9

纵观全球图书馆事业的发展趋势，图书馆国际化不仅是图书馆的重要理念，而且已成为世界图书馆的具体实践。经济全球化、高新技术手段、世界政治现状、图书馆联盟、国际图联的推动、信息社会的需求和图书馆的自身发展是推动图书馆国际化的重要因素。  相似文献   

鲁迅与毛边本     

张磊 《图书馆论坛》2004,24(6):280-281

考察并论述了鲁迅引进毛边本的缘由及其作用和影响。  相似文献   

硝化法合成邻硝基苯甲醛     

任谦 《泰州职业技术学院学报》2004,4(1):27-28

通过硝化法合成邻硝基苯甲醛实验的比较，介绍A法的反应原理及实验。  相似文献   

Postural stability,clicker reaction time and bow draw force predict performance in elite recurve archery     

Wayne Spratford  Rhiannon Campbell 《European Journal of Sport Science》2017,17(5):539-545

Recurve archery is an Olympic sport that requires extreme precision, upper body strength and endurance. The purpose of this research was to quantify how postural stability variables both pre- and post-arrow release, draw force, flight time, arrow length and clicker reaction time, collectively, impacted on the performance or scoring outcomes in elite recurve archery athletes. Thirty-nine elite-level recurve archers (23 male and 16 female; mean age?=?24.7?±?7.3 years) from four different countries volunteered to participate in this study prior to competing at a World Cup event. An AMTI force platform (1000Hz) was used to obtain centre of pressure (COP) measurements 1s prior to arrow release and 0.5s post-arrow release. High-speed footage (200Hz) allowed for calculation of arrow flight time and score. Results identified clicker reaction time, draw force and maximum sway speed as the variables that best predicted shot performance. Specifically, reduced clicker reaction time, greater bow draw force and reduced postural sway speed post-arrow release were predictors of higher scoring shots. It is suggested that future research should focus on investigating shoulder muscle tremors at full draw in relation to clicker reaction time, and the effect of upper body strength interventions (specifically targeting the musculature around the shoulder girdle) on performance in recurve archers.  相似文献   

影响男子排球运动员扣球起跳动作效果的 动力学研究          下载免费PDF全文

贾谊 《河北体育学院学报》2017,31(5):64-70

目的:研究男子排球运动员扣球起跳蹬地动作过程中,人体下肢的相关力学参数特征.对象:男子大学生排球运动员10名.方法:使用高速人体动作捕捉系统及三维测力台,对相关运动学和动力学参数进行采集.结果:①起跳过程中,地面反作用力峰值和均值均为优势腿大于非优势腿;②非优势腿地面反作用力峰值与重心最大高度呈高度负相关(r=-0.961,P=0.002＜0.05);③双脚同时着地过程中,优势腿地面反作用力冲量明显大于非优势腿,两脚地面反作用力冲量差与重心最大高度呈显著负相关(r=-0.531,P=0.034＜0.05).结论:①在后排起跳过程中,优势腿与非优势腿表现出不同的用力形式;②应当通过适当控制非优势腿在着地初期的制动作用,并在双脚最后用力阶段有意识地提高非优势腿的参与程度,以提高人体的起跳高度;③排球运动员髌腱炎的发病可能与踝关节绕矢状轴力矩和膝关节绕垂直轴力矩较大有关.  相似文献   

Are gait characteristics and ground reaction forces related to energy cost of running in elite Kenyan runners?     

J. Santos-Concejero  N. Tam  D. R. Coetzee  J. Oliván  T. D. Noakes  R. Tucker 《Journal of sports sciences》2017,35(6):531-538

The aim of this study was to determine whether gait cycle characteristics are associated with running economy in elite Kenyan runners. Fifteen elite Kenyan male runners completed two constant-speed running sets on a treadmill (12 km ·h^?1 and 20 km ·h^?1). VO₂ and respiratory exchange ratio values were measured to calculate steady-state oxygen and energy cost of running. Gait cycle characteristics and ground contact forces were measured at each speed. Oxygen cost of running at different velocities was 192.2 ± 14.7 ml· kg^?1· km^?1 at 12 km· h^?1 and 184.8 ± 9.9 ml· kg^?1· km^?1 at 20 km· h^?1, which corresponded to a caloric cost of running of 0.94 ± 0.07 kcal ·kg^?1·km^?1 and 0.93 ± 0.07 kcal· kg^?1· km^?1. We found no significant correlations between oxygen and energy cost of running and biomechanical variables and ground reaction forces at either 12 or 20 km· h^?1. However, ground contact times were ~10.0% shorter (very large effect) than in previously published literature in elite runners at similar speeds, alongside an 8.9% lower oxygen cost (very large effect). These results provide evidence to hypothesise that the short ground contact times may contribute to the exceptional running economy of Kenyan runners.  相似文献   

模块化生产网络背景下的劳资关系研究     

陈硕颖 《教学与研究》2011,(5)

模块化生产网络是20世纪80年代以来,跨国公司为了实现弹性生产而组织的全球分工体系。模块化分工促使供应商分化为一级供应商和底层供应商,劳动力分化为核心劳动力和边缘劳动力。劳动力的分化与资本权力的集中造成资强劳弱格局的复辟,从而导致工会力量的衰退和收入差距的扩大。中国在融入全球分工体系的过程中,不可避免地受到全球资强劳弱格局复辟的影响。正确认识这一影响,对于调整国内劳资关系具有重要的意义。  相似文献