Comparative Analysis On The Application Effect Of Libero Technology In The Top Four Teams Of Women’s Volleyball World Cup In 2019

The women’s volleyball world cup is one of the three major international volleyball events.the women’s volleyball world cup was held one year before the Olympic games and has served as the qualifying match for the Olympics over the years(the international volleyball Federation announced that the 2019 volleyball world cup will not be a qualifying match for the tokyo Olympics).Therefore,it also makes this event especially important,one of the highest level events in the world volleyball world today,and has attracted the attention of all countries in the world.This paper uses literature,video observation,mathematical statistics,comparative analysis and other research methods,taking the technical application of four free men in the top four teams of the 2019 Women’s Volleyball World Cup,namely,Wang Mengjie of China,Courtney of the United States,Galkina of Russia and Leia of Brazil,as research objects,and makes comparative analysis on the technical application of free men,finding out the gap and deficiency between the free men of China’s women’s volleyball and the free men of the world’s top women’s volleyball teams,and draws the following conclusions:1.The height of libero in the world cup of women’s volleyball is between160-185cm;the age span of libero is large,between 25-35 years old;therefore,different ages and heights can be excellent free defenders.2.In the first attack system,the team with a high level of free service reception has a higher overall service reception level,and the competition results are better.Therefore,one pass is the key that directly affects the team’s success among the strong teams in various countries.3.In the counter-offensive system,the top four teams attach great importance to the defensive link.The libero defensive ability in the team is no better than that of other players.The libero defensive ability in various countries is relatively balanced.4.In the protection and attack system,the overall protection effect of the Chinese team(including the free men)is poor,and the error rate is high.The overall attention of the Chinese team to the protection link is not enough,and the protection awareness is still lacking.5.In the push and attack system,Wang Mengjie of the Chinese team has the least number of touches and the lowest rate of reaching the goal.Wang Mengjie lacks experience and is easily affected when receiving the push and attack.6.In the adjustment ball,there is no difference in the effective rate of libero in the four countries,and the adjustment ability of libero in the four countries is relatively balanced.