青少年儿童协调能力的训练方法

运动员的力量、速度、耐力水平是运动员体能水平的外在表现,协调能力则更多地体现着机体内部,以及机体与运动时的外部环境之间的协同状态。在平时的训练过程中,注重协调能力训练的能胜任更高的训练和比赛要求,更易发挥和保持运动成绩。     

运动应激与免疫

本质上讲，运动训练的过程就是有机体与施加负荷的外环境不断取得平衡的过程，即适应过程。在适应过程中，机体内部会生一系列变化。而发生在免疫系统内部的变化是适应过程中一个十分重要的组成部分。本文较为详尽地讨论了免疫系统对应激所作的一系列反应。为运动训练的实施提供了科学依据。     

定向越野运动员赛前训练过程中血氨的变化

为了寻找定向越野运动训练过程中与运动强度相适应的敏感指标,监测定向越野运动员运动训练过程中的身体机能变化,本文利用分光光度法对我院九名定向越野运动员进行了赛前五周血氨的测试。实验结果表明：赛前五周运动员的血氨发生了显著的变化,出现了先升高后降低的变化趋势。结论：定向越野运动训练过程中,血氨能够精确地评价运动员的机体机能状态。     

低氧训练中低氧诱导因子-1表达对骨骼肌铁代谢影响的研究进展

铁在许多生理过程中发挥着重要的作用,参与机体ATP合成、氧的转运与利用.运动与铁代谢有着密切的联系,运动会改变机体铁稳态.低氧训练作为一种日益发展起来的训练方法对机体的运动能力产生较大的影响.低氧诱导因子-1(hypoxia-inducible factor-1,HIF-1)作为低氧应答的关键环节使机体产生多方面适应性变化,近年来发现二价金属离子转运体1(divalent metal transporter l,DMT1)、EPO、跨膜丝氨酸蛋白酶6(transmenbrance serine proteases 6,TMPRSS6)等是HIF-1的靶基因,并深入影响了机体以及骨骼肌的铁代谢,有助于阐明低氧训练对骨骼肌铁代谢影响的机制.在低氧训练过程中肠铁吸收、机体铁状态的变化也会引起运动员骨骼肌铁代谢发生变化和适应性调节.     

体育运动过度疲劳及其预防措施

运动训练本身是训练一疲劳-恢复周而复始的过程.人在运动时,机体生理过程不能持续其机能在一特定的水平上,或各器官不能维持预定的运动强度,肌肉持久重复收缩而使工作能力下降的现象被称为运动性疲劳.……     

女性过度运动与低垂体促性腺素

运动训练尤其是长时间高负荷的运动训练可导致机体产生多种病理或生理学变化,其中内分泌系统的紊乱较为常见。不仅导致机体运动能力下降和疲劳消除延长,在女性还具体表现在月经失调、闭经及至以后的习惯性流产、不孕等方面。由运动引起的下丘脑促性腺激素释放激素（GnRH）分泌不足,干预机体自身的性腺轴调控,可对妇女形成“运动性月经失调”。     

模拟高原训练（低氧训练）对人体运动能力的影响机制研究

通过对目前国内外模拟高原训练(低氧训练)在运动能力方面的研究进行综述,重点分析模拟高原训练(低氧训练)对人体运动能力的影响机制,包括低氧诱导因子1、耐力运动能力、缓冲能力和体成分,以及模拟高原训练(低氧训练)实施步骤。研究表明,低氧训练具有良好的大众健身效益。大运动量训练能引起运动员机体免疫功能下降,尤其在低氧暴露过程中,低氧和训练的双重刺激更能引起运动员机体免疫功能下降。研究认为,结合低氧与免疫抑制可作为一种有效的试剂,至少短期内有效。同时对模拟高原训练(低氧训练)的热点问题和未来研究方向进行探讨,以期为低氧训练在竞技体育和大众健身上提供理论依据和实践参考。     

儿童少年运动疲劳的特点与消除

根据1982年第五届国际运动生物化学会议关于疲劳的定义是：机体生理过程不能持续其机能在一特定水平或和各器官不能维持预定的运动强度．运动员在运动过程中产生的疲劳是一种生理现象,“没有疲劳就没有训练”,它表现为机体工作能力的暂时降低,经过适当的休息和合理的训练调整可以得到恢复．由于儿童少年正处在生长发育期,如何进行科学的训练,及时发现运动疲劳出现的表象,     

体育运动过度疲劳及其预防措施

运动训练本身是训练—疲劳—恢复周而复始的过程。人在运动时,机体生理过程不能持续其机能在一特定的水平上,或各器官不能维持预定的运动强度,肌肉持久重复收缩而使工作能力下降的现象被称为运动性疲劳。运动性疲劳是一种外周性疲劳,它包括除神经系统外各器官在疲劳时的变化。可以认为在一定范围内,疲劳的程度越大,若施以合理的恢复手段,超量恢复也越明显。当运动员接受过量的训练,经过适当的恢复期仍不能维持其正常的运动水平时,则有可能发生过度疲劳。过度疲劳不仅对提高运动成绩不利,使运动员丧失参加比赛的机会,或者不能取得应有的运动…     

现代运动训练过程中的恢复问题探析

现代运动训练实质上是一个循环过程,恢复是训练过程中一个不可缺少的组成部分,负荷与恢复是相辅相成的。在实际训练中往往忽视运动训练中技术不合理导致疲劳过早产生,轻视运动训练过程中恢复的重要性,以及缺乏对训练课结束部分恢复的重视。本文针对上述问题在降低运动过程中不合理疲劳的产生、重视运动训练过程中的疲劳恢复、加强运动训练结束部分疲劳的恢复以及运动训练课后疲劳的恢复等方面做了进一步探讨,并提出解决的对策,对运动训练过程加强恢复提供相应的理论参考。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.