少年中长跑运动员跑的经济性与运动成绩关系研究   总被引：4，自引：0，他引：4  

蔡秋  卢亮球 《广州体育学院学报》2004,24(6):66-68,76

以体校男女各13名少年运动员为研究对象,采用跑台逐级递增负荷运动试验测试最大吸氧量,并以24m·min-1的恒定跑台速度测试跑的经济性RE,呼出气体通过JaegerEOS心肺功能测试仪,用开放式气体测试法分析。文中运动员成绩均为竞赛成绩。实验结果表明,跑的经济性RE(ml·kg-1·min-1)无显著性性别差异(P>0.05),但个体间存在较大的差异。RE(ml·kg-1·min-1)与1500m、400m跑运动成绩无显著性相关,RE(％V2max)与10km跑成绩呈显著相关。提示RE在较长距离跑中起重要作用。运动员想提高耐力水平,可以通过提高最大有氧能力或改善技术以提高经济性这两种方法实现。  相似文献   

跳远助跑速度利用率的探讨   总被引：2，自引：0，他引：2  

汪海燕 《首都体育学院学报》2004,16(2):63-65

跳远是我国田径运动项目中运动水平较高的项目之一,近来关于助跑速度利用率的问题引起了讨论,本文认为高助跑速度利用率并没有达到预期的效果,它对起跳技术的影响直接降低了运动成绩,多年来在高助跑速度利用率条件下改进起跳技术未见明显成效,并提出采用较低的助跑速度利用率的可能性和考虑国外优秀运动员经验的建议。  相似文献   

大学生耐力跑项目改革实验之研究   总被引：3，自引：0，他引：3  

刘桂海  任海平  倪进  杨光 《四川体育科学》2002,(3):28-29

对现有的大学生耐力跑项目教学测试进行剖析，分析其不合理性，同时提出建立较为科学的耐力跑标准和练习方法，通过实验得以实证。  相似文献   

高校图书馆文献资产流失现状及管理对策研究   总被引：6，自引：0，他引：6  

韩淑红  郭健民 《图书馆建设》2006,(1):69-71

本文对高校图书馆文献型国有资产的现状和流失现象进行分析,在此基础上重点探讨高校图书馆文献国有资产的管理,提出控制对策以供商榷。  相似文献   

Neuro-mechanical adjustments to shod versus barefoot treadmill runs in the acute and delayed stretch-shortening cycle recovery phases     

Cedric Morio  Violaine Sevrez  Pascale Chavet  Eric Berton  Caroline Nicol 《Journal of sports sciences》2016,34(8):738-745

In habitually shod recreational runners, we studied the combined influence of footwear and stretch-shortening cycle (SSC) fatigue on treadmill running pattern, paying special attention to neuro-mechanical adjustments in the acute and 2-day delayed recovery periods. The SSC exercise consisted of a series of 25 sub-maximal rebounds on a sledge apparatus repeated until exhaustion. The acute and delayed functional fatigue effects were quantified in a maximal drop jump test. The neuro-mechanical adjustments to fatigue were examined during two submaximal treadmill run tests of 3 min performed either barefoot or with shoes on. Surface electromyographic (EMG) activities, tibial accelerations and kinematics of the right lower limb were recorded during the first and last 15 s of each run. The main result was that neuro-mechanical differences between the shod and barefoot running patterns, classically reported in the absence of fatigue, persisted in the fatigued state. However, in the delayed recovery phase, rearfoot eversion was found to significantly increase in the shod condition. This specific footwear effect is considered as a potential risk factor of overuse injuries in longer runs. Therefore, specific care should be addressed in the delayed recovery phase of SSC fatigue and the use of motion control shoes could be of interest.  相似文献   

Reliability and validity of the Myotest® for measuring running stride kinematics     

Cyrille Gindre  Kim Hebert-Losier  Jean-Benoit Morin 《Journal of sports sciences》2016,34(7):664-670

Accelerometer-based systems are often used to quantify human movement. This study’s aim was to assess the reliability and validity of the Myotest® accelerometer-based system for measuring running stride kinematics. Twenty habitual runners ran two 60 m trials at 12, 15, 18 and 21 km·h^?1. Contact time, aerial time and step frequency parameters from six consecutive running steps of each trial were extracted using Myotest® data. Between-trial reproducibility of measures was determined by comparing kinematic parameters from the two runs performed at the same speed. Myotest® measures were compared against photocell-based (Optojump Next®) and high-frequency video data to establish concurrent validity. The Myotest®-derived parameters were highly reproducible between trials at all running speeds (intra-class correlation coefficient (ICC): 0.886 to 0.974). Compared to the photo-cell and high-speed video-based measures, the mean contact times from the Myotest® were 34% shorter and aerial times were 64% longer. Only step frequency was comparable between systems and demonstrated high between-system correlation (ICC ≥ 0.857). The Myotest® is a practical portable device that is reliable for measuring contact time, aerial time and step frequency during running. In terms of validity, it provides accurate step frequency measures but underestimates contact time and overestimates aerial time compared to photocell- and optical-based systems.  相似文献   

带钢的"跑偏"及纠正   总被引：2，自引：0，他引：2  

谢忠亮 《辽宁科技学院学报》2003,5(2):14-16,19

针对带钢在运送过程中，受各种因素影响而出现的“跑偏”情况加以说明、分析。并提出采用控制辊系统纠偏方式，并对其纠偏方式进行分析、探讨。  相似文献   

中外合作办学教学质量内部监控及其体系构建   总被引：1，自引：0，他引：1  

孙泽文  叶敏  刘俊平 《成都教育学院学报》2011,25(1):64-68

中外合作办学教学质量日益成为社会关注的焦点,必须建立和完善其教学质量的内部监控体系与运行机制。不能把国内的一套体系和程序简单地移植过来,而应针对当前教学质量存在的问题,坚持教学质量监控的基本原则,借鉴国外教学质量管理经验,构建适合中外合作办学的教学质量内部监控体系。并在这个体系的框架下,积极寻求质量保障的路径与对策,形成高效的运行机制,打造出自己的质量品牌和特色。  相似文献   

基于乔治预测法评估最大摄氧量的可靠性研究     

周在平  任占兵 《广州体育学院学报》2015,35(3):96-99

本研究目的主要探索采用跑步经济性测量相关指标基于乔治预测法评估最大摄氧量(VO2max)的可靠性。研究思路通过Bland-Altman方法来比较VO2max乔治预测法和实验室测试法的一致性。研究对象选择8名受过良好中长跑训练的运动系学生,受试者的基本情况:年龄(21.50±0.53)岁、身高(172.2±3.89)cm、体重(63.2±3.72)kg。第一天测试VO2max,隔日在跑台以次最大强度下测试跑步经济性相关指标(摄氧量、心率、体重等)。研究结果发现,通过乔治预测法估算获得8名受试者的VO2max值比实验测试值略高,但通过配对样本t检验发现,两组数据之间的差异不具有显著性(p=0.306(0.05),8个差值均位于95%一致性界限以内。研究结论认为,VO2max乔治预测法和实验室测试法一致性较好,采用跑步经济性测量相关指标基于乔治预测法测量评估VO2max比较可靠,评估结果可以达到实验室测试法的效果。  相似文献   

安徽省高校中外合作办学的调查分析与对策研究     

闫蒙钢  王光煜  叶旭萍 《阜阳师范学院学报(社会科学版)》2015,(2)

安徽省高校中外合作办学规模不断扩大,质量稳步提高,已经成为安徽省高等教育国际合作与交流的重要途径和手段之一,为深化教育教学改革、创新人才培养模式提供了崭新的实践平台。但同时也存在着认识不到位、体制不完善、办学质量保障体系不健全、引进优质教育资源总量不足、学科专业设置结构不平衡等问题。从宏观上说,促进中外合作办学真正成为继公办教育、民办教育后的又一重要办学力量,需要从教育理念和体制机制两个层面入手。  相似文献