The Research Of Chinese Men's Weightlifting 69-kilogram Athletes Technical Characteristics

purposes:In the weightlifting program men's 69 kg class in the country,Asia and the world record all by our weightlifters to maintain,while in 2016 Rio Olympic Games in Zhejiang teenager Shi Zhiyong to win,once again to defend China's dominance of this level.This study attempts to analyze the personal technical characteristics of Chinese men's 69 kg weightlifting athletes' snatching and jerking aspects,and to speculate on the causes of failure,and provide technical reference for Chinese coaches,athletes and future corresponding research.To promote our men's 69 kg weightlifting level of continuous improvement.methods:In this study,we collected the whole process video data of the National Weightlifting Championships in October 2015 and the National Weightlifting Championships and the 2016 National Weightlifting Championships and the Olympic Games,and selected the national weightlifting championships.The second and third athletes Wu Xianhua,Huang And the first group of national weightlifting championships,according to the study of the need to select the corresponding the first 2,3,4 the name of the first three or four athletes Huang Wenwen,As an ordinary group).National Weightlifting Championships single snatch the top three athletes Liao Hui,Shi Zhiyong and Qiao Ningbo;single Tingju the top three athletes Liao Hui,Shi Zhiyong and Qiao Ningbo as the focus group.In view of a large number of literature,visit the weight of the experts have a high degree of knowledge on the basis of the three-dimensional analysis of the collected video,get the relevant technical indicators data.Later,through the analysis of the relevant technical indicators of the collected key groups and the general group of snatch and jerkies,as well as the analysis of the technical indicators of the focus group and the success and failure of the snatch,the Chinese men's weightlifting 69 kg class key athletes Technical characteristics,and the reasons for the failure of the focus group.Results:1.This study shows that in the whole process of snatch focus group and ordinary group forcibly rhythm is different,the Chinese men's 69 kg category key players in the power stage has big power,power effect is good,the bell technical characteristics with good effect.2.In the snatch of bell stage,the focus group of athletes and the barbell up fully more ideal height,for the power behind the stage ready to more fully the barbell height and speed conditions;Lead the extent of knee is greater than the ordinary group of athletes at the same time the size of the knee.So China men's weightlifting 69-kilogram focus group of athletes with and fully,lead knee range is big,the better the technical features of the lead knee technology.3.in the clean and jerk,the bell to the chest stage focus group of athletes in the speed of the beginning stage in hair force is big,in the normal group and at this stage the barbell fell short distance;In a stage on the swimmer speed is less than the normal group;At the same time in the clean and jerk two stages before and after the barbell in the athletes in the direction of the offset is less than the normal group.Therefore in the process of the clean and jerk 69 kg key players of our country has to withdraw to the stage of chest hair strength,barbell fell short distance;And the technical features of the barbell direction displacement before and after small.Thus suggests that the key players in China have a higher fluid technology and more stable movement technical structure.4.This study shows that Liao Hui and inadequate fluid phase I see is the failure of the snatch factors;I see rhythm slow resulting in a barbell in the moment to the swimmer height,the swimmer moment speed to reach the best size is the cause of the clean and jerk failure.5.Zhiyong shi in the snatch barbell center of gravity and the technical features of the gravity center spacing is too large,and through the analysis of the failed attempt the causes of failure are as follows:stretch the knee to inadequate fluid phase I see,and soon to open the hip,hip power caused by premature,thus affecting the quality of the whole action.At the same time,zhiyong shi barbell center of gravity in coronary shaft are too offset,should analysis the existence of two side muscle strength development not balanced,which will affect snatch process,need to be researched deeply.Suggest zhiyong shi in the clean and jerk of usual training first attention should be paid to improve gas chest and actions;Secondly improve waist,hip into action,make a barbell center of gravity and body centre of gravity is as far as possible close to or overlapping;Again is to improve problems in the process of the squatting too deep;Finally solve the problem of arm in force in advance.6.This study shows that Joe ningbo lead knee lift bell stage knee range is too small to snatch the cause of the failure.Ningbo on a stage at the same time,Joe lunge squat nowadays squatting rhythm is unreasonable,the quadriceps muscle and the thigh of the explosive force is too weak to ningbo,clean jerk attempt failed braking ability is not enough lead to Joe.