【摘要】：研究目的:本文對撐竿跳運(yùn)動(dòng)員牛春格最后兩步助跑及起跳的技術(shù)動(dòng)作進(jìn)行了研究,希望通過本研究能夠找出其技術(shù)動(dòng)作中的錯(cuò)誤與不足,給出技術(shù)改進(jìn)的方法,最終使其運(yùn)動(dòng)成績快速提高。研究方法:本文采用文獻(xiàn)資料法、實(shí)驗(yàn)法、數(shù)理統(tǒng)計(jì)等方法,對牛春格最后助跑及起跳的技術(shù)動(dòng)作進(jìn)行研究。研究結(jié)果:1、牛春格在倒兩步助跑技術(shù)上有明顯改進(jìn)和提高,倒一步步長由原來大于倒二步步長變?yōu)楝F(xiàn)在的小于倒二步步長,跑進(jìn)更加積極主動(dòng)。2、牛春格最后兩步助跑的水平速度有了一定的提高,差值變化較為合理,但其最后兩步的連貫程度還需要進(jìn)一步提升。最后一步步速也較之前有所提高,減少了水平速度損失率,表現(xiàn)出較強(qiáng)的進(jìn)攻意識(shí)。3、牛春格助跑時(shí)身體重心趨于平穩(wěn),起跳重心高度還有待進(jìn)一步提升。4、牛春格起跳時(shí)竿弦角較以前更加合理,動(dòng)能向彈性勢能的轉(zhuǎn)化率越來越高,減少能量損失。5、在起跳時(shí),逐漸打開下手肘角,肩肘角變化較之前更為合理,為后續(xù)動(dòng)作創(chuàng)造了良好條件。6、牛春格著地軀干角由93.5°減小至89.6°,起跳時(shí)軀干后仰問題得到解決。7、牛春格的起跳膝角由原來的165.5°變?yōu)?72.4°,膝角變大,符合爆發(fā)式蹬伸要求。8、牛春格的助跑技術(shù)逐漸穩(wěn)定,通過訓(xùn)練,重心騰起角接近國內(nèi)優(yōu)秀撐竿跳運(yùn)動(dòng)員的重心騰起角水平。研究結(jié)論:1、牛春格倒一步步長由原來大于倒二步步長變?yōu)楝F(xiàn)在的小于倒二步步長,且最后兩步助跑水平速度得到提升,牛春格在倒兩步助跑技術(shù)上有明顯改進(jìn)和提高,跑進(jìn)更加積極主動(dòng),進(jìn)攻意識(shí)增強(qiáng)。2、牛春格起跳時(shí)下手肩角增大,下臂撐竿意識(shí)增強(qiáng),下肘角增大,起跳時(shí)手臂對肢體的支撐更加穩(wěn)定。3、牛春格后蹬膝角增加,大腿緩沖能力增強(qiáng),蹬伸更加充分。
[Abstract]:The purpose of this paper is to study the technical movements of pole jumper Niu Chunge in the last two steps of run-up and take-off, hoping that through this study, we can find out the errors and shortcomings in the technical movements, and give the methods of technical improvement. In the end, it can improve its sports performance quickly. Research methods: in this paper, the technical action of Niu Chunge's final run-up and take-off is studied by means of literature, experiment and mathematical statistics. The results are as follows: 1. Niu Chunge has obviously improved and improved the inverted two-step run-up technology, and the reverse step length has changed from the original larger than the inverted two-step to the present less than the inverted two-step, so that Niu Chunge is more active. 2, The horizontal speed of Niuchunge's last two steps has been improved to a certain extent, and the difference change is more reasonable, but the coherence of the last two steps needs to be further improved. The last step speed is also higher than before, reducing the horizontal speed loss rate, showing a strong sense of attack. 3, Niuchunge run-up body center of gravity tends to be stable, take-off center of gravity height needs to be further improved. 4, When Niuchunge takes off, the string angle of the pole is more reasonable than before, the conversion of kinetic energy to elastic potential energy is higher and higher, and the energy loss is reduced. 5. During take-off, the angle of hand elbow is gradually opened, and the change of shoulder and elbow angle is more reasonable than before. It created good conditions for the following action. 6, the dry angle of Niuchunge landing body decreased from 93.5 擄to 89.6 擄, and the problem of trunk backtracking was solved during take-off. 7, the take-off knee angle of Niuchunge changed from 165.5 擄to 172.4 擄, and the knee angle became larger. According to the requirements of explosive pedal extension. 8, Niu Chunge's running-up technique is gradually stable. Through training, the lifting angle of the center of gravity is close to the level of the lifting angle of the center of gravity of the domestic elite pole vault athletes. The conclusions are as follows: 1. Niuchunge's inverted step length has changed from the original larger than the inverted two-step to the present less than the inverted two-step, and the horizontal speed of the last two steps has been improved, and Niuchunge has obviously improved and improved the inverted two-step run-up technology. When Niuchunge took off, the shoulder angle increased, the consciousness of the lower arm pole increased, and the lower elbow angle increased, and the arm support to the limb was more stable during the take-off. 3, the knee angle increased after Niuchunge took off. Thigh cushioning ability is enhanced, pedal extension is more adequate.
【學(xué)位授予單位】：西安體育學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：G823.2

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