| The World Volleyball Championship is the earliest origin and the largest number of participating teams(currently 24,will be expanded to 32 in the next edition),and is recognized as the largest and highest level of volleyball in the world,representing the development trend of competitive volleyball in the world today.The Chinese women’s volleyball team,which mainly participates in the new look,new layout and young players,achieved the 6th place in the 2022 Women’s World Volleyball Championship,completing the set phased task goals,and also reflects that there is still a certain gap between it and the world’s outstanding women’s volleyball teams in terms of offensive and defensive strength.In order to complete the scientific and technological research project of the Chinese women’s volleyball team in the new Olympic cycle,accurately understand the actual situation of the competition between the world’s outstanding women’s volleyball teams,and grasp the latest competitive pattern of the world women’s volleyball today,the paper collects the video collection of the entire schedule of the Chinese women’s volleyball team in the 2022 World Women’s Volleyball Championship,and takes the application effect of the offensive and defensive technology of the previous eight women’s volleyball teams as the research object,analyzes the offensive and defensive comprehensive strength of the Chinese women’s volleyball team and its main competitors from a quantitative perspective,establishes an evaluation model,and prepares opponents for future targeted preparation of the competition.Conduct big data analysis and accumulate data.The research methods used in the paper mainly include literature method,expert interview method,video statistics method,WRSR comprehensive evaluation method,etc.,and the technical and tactical application effect and offensive and defensive strength of the Chinese women’s volleyball team and the other seven top 8 women’s volleyball teams in the 2022 Women’s Volleyball World Championship are compared and comprehensively evaluated,and the main research results of the paper are as follows:1.Technical effect:In terms of offensive technology,(1)the Chinese women’s volleyball team has a relatively single serving method,mainly based on the technique of jumping and drifting,although the service error rate is the lowest,but the general serving rate(73.5%)is higher than that of the other seven teams,and the serving and breaking tactical ability is poor.(2)In terms of passing,the Chinese women’s volleyball team’s pass was blocked by 0-1 people with a rate of 21.8%,ranking fourth in the top eight,and the pass failure rate(0.7%)and error rate(0.7%)were the highest,ranking first and second in the top eight respectively.(3)In terms of offense(smashing),the Chinese women’s volleyball team has a scoring rate of 44.1% in the first attack,which is only higher than the US women’s volleyball team and ranks seventh in the top eight,and the one-attack error rate and blocked loss rate are lower than the other seven teams;The Chinese women’s volleyball team’s defensive counter-scoring rate is 39.1%,which is far behind the championship-winning Serbian women’s volleyball team(52.4%)and the third-place Italian women’s volleyball team(45.6%).It is worth noting that the Chinese women’s volleyball team has a higher anti-error rate(9.2%)and a blocked loss rate(7.2%),ranking third and second in the quarterfinals.These data results suggest the direction of improving the training of the Chinese women’s volleyball team.In terms of defensive technology,(1)the Chinese women’s volleyball team received the serve in place(21.9%)and the semi-in rate(38.0%),ranking fourth and fifth in the quarterfinals;When facing aggressive and powerful jumping serves,the no-attack rate(5.1%)was the highest,ranking first in the quarterfinals.(2)In terms of blocking technology,the Chinese women’s volleyball team has a higher error rate than European and American strong teams,with lower blocking efficiency(59.2%)and lower defensive starting rate(44.7%)in the back row,and the overall blocking effect is poor,ranking seventh and sixth in the top eight.The imbalance of the blocking and defense system directly affects the offensive efficiency of the anti-counterattack,which is the outstanding shortcoming of the current Chinese women’s volleyball team.2.Offensive tactical play:The offensive tactics of the Chinese women’s volleyball team mainly revolve around Li Yingying,and the front-row offensive tactics are the mainstay,of which the No.4 strong attack accounts for the highest proportion(46.5%),and the scoring rate is42.2%,ranking third in the top eight.The proportion of strong attack in the No.2position is small,and the scoring rate is only 39.0%,which is significantly different from the championship-winning Serbian women’s volleyball team and the third-place Italian women’s volleyball team(P<0.05),and the offensive scoring ability is obviously insufficient.In terms of the use of offensive tactics in the back row,it is lower than that of the other seven teams,and the use rate of back attack is only 8.0%,especially in the back row of the No.2 position,the proportion of attack is only 1.9%,which is a very significant difference with the other seven teams(P<0.01).In addition,the Chinese women’s volleyball team has certain advantages in the use of fast attack tactics in the No.2 and 3 positions,with the highest scoring rate of back flying and back fast tactics,with 53.8%.Single offensive tactics and uneven distribution of offensive points are problems that need to be improved urgently for the Chinese women’s volleyball team.3.Evaluation of offensive and defensive strength:The RSR value of offensive strength,defensive strength RSR value and offensive and defensive comprehensive strength RSR value of the top eight teams of the 2022Women’s Volleyball World Championship were significantly correlated with the actual match ranking results(P<0.01),indicating that the more comprehensive the offensive and defensive skills,the more balanced the offensive and defensive strength,and the higher the offensive and defensive comprehensive strength ranking.This result provides data support for the quantitative evaluation of the offensive and defensive strength of the women’s volleyball team.The RSR value of the offensive strength of the Chinese women’s volleyball team in this World Championship is 0.561,which is at the C level,ranking fourth and in the2 nd gear level;the defensive RSR value is 0.416,which is at the C level,ranking seventh and in the 3rd level,showing that the current Chinese women’s volleyball team belongs to the strong and weak offensive and defensive teams.Its comprehensive offensive and defensive strength RSR value is 0.499,ranking fifth at the C level,ranking fifth and in the 3rd gear level,and there is a big gap with Serbia,Brazil,Italy and the United States women’s volleyball teams in terms of offensive and defensive comprehensive strength. |
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