Analysis Of The Characteristics Of Chinese And Foreign Libero Defensive Player Movements In The 2018 World Men's Volleyball League

Objective: To study the movement rules and characteristics of Libero Defensive Player volleyball players in the competition.Methods: By using the methods of documentation,video analysis and mathematical statistics,this study studied the number of touches,the characteristics of mobile footwork,the comprehensive application of step method in multi-turn defensive conversion and the range of defensive movement of the five national teams of China,Italy,Poland,Australia and Japan who participated in the 2018 World Men's Volleyball League.Statistical analysis was carried out.Result:(1)The total number of Libero Defensive Player in China,Italy,Poland,Australia and Japan was 120,84,86,86 and 110 respectively.Comparing with the situation of receiving and serving in mobile,the number of Libero Defensive Player receiving in the above five teams is 46,25,27,58 and 57 times respectively,and the arrival rates are 52.1%,40%,55.6%,58.6% and 68.4% respectively.(2)The total number of Libero Defensive Player touching the ball in defence of the five teams is 48,69,59,77 and 96,respectively.Among them,the number and degree of defense in mobile situation are: 43 times for Chinese team,27.1% for arrival,48 times for Italian team,56.6% for arrival,45 times for Poland team,33.9% for arrival,52 times for Australian team,57.1% for arrival,54 times for Japanese team and 33.7% for arrival.(3)In terms of the total number of mobile footwork,the Libero Defensive Player of China,Italy,Poland,Australia and Japan are 146,47,54,141 and 127 times respectively in receiving and serving links.In the follow-up protection link,the Libero Defensive Player of the five teams were 341,316,237,272 and 127 respectively.In defensive links,they moved 262 times,205 times,175 times,219 times and 325 times respectively.(4)In terms of mobile range,China,Australia and Japan have about 30 square meters of Libero Defensive Player,while Italy and Australia have 58 square meters and 54 square meters of Libero Defensive Player respectively.Conclusion:1.The speed at which a Libero Defensive Player moves can not be measured only by the speed of body displacement.It also involves the rationality and rhythm of the footwork.2.Use the type of footwork and mobile features:(1)The pick-up link involves the ball on both sides of the body.The Libero Defensive Player of the three Asian teams are more frequent,and the of the Italian and Wave teams use more side-ball techniques.When it comes to the ball before and after the body,the teams use the stride ball catching technique more frequently.(2)In the offensive protection link,the free team of the Chinese team has a deeper follow-up position,and the conversion of the defensive position has brought about a disadvantage of a long moving distance.Other teams use transitional transitions to initiate a second move closer to the target.(3)In the defensive section,it is more advantageous to use the running,stride and adjustment steps to complete the light smash or lob.In the long-distance movement process,the connection technique of running + stepping and emergency stop is better.3.In the multi-round defensive conversion process,different links have their regular characteristics of using the footwork,but the initial step and the final step are more important,and can effectively guarantee the standardization of technical actions.