共查询到20条相似文献，搜索用时 281 毫秒
1.
胡大雄 《中国基础教育研究》2009,5(10):50-51
绝对力量是短跑运动的基础,力量耐力是短跑运动的保证,快速力量是短跑运动的关键。斜坡跑对发展绝对速度、快速力量和速度耐力有很好的作用。练习上坡跑,既有利于促进加大步长,又有利于发展短跑所需的“快速力量”;练习下坡跑,由于惯性的作用,既有利于促进步频的发展提高,又有利于体会短跑放松跑技术。对我校学生短跑教学进行实验研究,研究结果证明,在50米短跑教学中采用斜坡跑练习是提高短跑成绩的有效途径。 相似文献
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短跑技术包括起动、起动后的加速跑、途中跑和终点冲刺。要提高短跑水平除重视运动员的选材和在高水平的训练基础上掌握合理的短跑技术外,主要靠改进跑的技术和练习方法。 相似文献
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研究了和短跑紧密相关的跳跃练习与短跑成绩之间的关系,发现30米跑和60米跑是提高速度最有效的训练手段,跳深和快速后蹬跑是提高短跑成绩的最有效的训练手段。 相似文献
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文章对短跑训练中斜坡跑的动作结构,以及在斜坡上进行的上坡跑和下坡跑练习的作用和效果进行分析,为斜坡跑练习提出可供参考的建议。 相似文献
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作者通过观察12名短跑运动员的短跑实践,解析了力量练习和短跑跑速之间的紧密关系。通过分析发现,跳深练习和快速跨跳练习的着地时间与速度水平相关,60米跑练习是快速达到最大速度最好的练习方法;跳深和快速跨跳是提高短跑成绩的最有效的手段之一。 相似文献
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短跑技术已由“后蹬式”变为“屈蹬式”跑法.而传统跑的专门性练习与现代“屈蹬式”短跑技术在动作结构，运动方向、路线、用力上存在着差异.为此对小步跑、后蹬跑、高抬腿跑的不足之处，逐一进行剖析.以期在短跑教学与训练中能引起重视. 相似文献
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通过文献资料,对当前短跑专门性练习的主流认识进行归纳．指出其建立在“髋动力来源论”基础上的现代短跑专门性练习的主流认识及引进“结构——定向教学理论”两处进步意义,同时对主流认识从技术要求和心理定向上进行修正,提出应该由半高抬小步跑、折叠高摆腿、小车轮跑这三个练习手段按照其固定顺序组成跑的专门性练习组合是比较合理的． 相似文献
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作者通过文献资料法、专家访谈法、实验法和数理统计法等方法,探讨短跑运动员的生理特征和短跑力量训练,通过蹲起加快速跑、快速挺举杠铃组合的力量训练手段,负重半蹲起、负重跑等力量组合练习,研究结果显示:有效的力量训练手段对短跑运动员成绩的提高效果显著,值得推广。 相似文献
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对跑的专门性练习的思考 总被引：1，自引：0，他引：1
短跑技术已由“后蹬式”变为“屈蹬式”跑法，而传统的专门性练习与现状“屈蹬式”短跑技术在动作结构，运动方向、路线，用力上存在着差异，为此对小步跑、后蹬跑、高抬腿跑的不足之处，逐一进行剖析， 期在短跑教学与训练中能引起重视。 相似文献
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杨善才 《连云港职业技术学院学报》2005,18(1):73-76
百米跑是速度性项目。要想跑出人体的最大速度，首先要有正确的短跑技术。随着科技的发展，塑胶跑道的问世，现代短跑技术又有新的进展，从而促使对短跑技术理论作新的理解和探讨。在途中跑中后蹬不再是短跑成绩的主要决定因素。摆动腿积极前摆、后扒才是提高短跑速度的关键。实践证明，采用必要的专门性辅助练习，能有效地改进途中跑摆动腿前摆后扒的技术，从而提高百米跑的专项成绩。 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
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. 相似文献
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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. 相似文献
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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. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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Rajesh Kanoi 《海外英语》2007,(1):52
Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer. 相似文献