| Synchronized swimming is a scoring sport,and the changes in the scoring standard more intuitively reflect the requirements of the rules for the development of the event.In recent years,with the renewal and improvement of the FINA synchronized swimming scoring rules and the continuous improvement of athletes’ technical level,the complete set of difficult movements has undergone major changes.As the international scoring rules for synchronized swimming continue to evolve to the present,the difficulty is divided for the first time in the2013 version of the synchronized swimming rules,and the difficulty is judged separately by the difficulty score;in the 2017 version of the rules,the difficulty action is divided into six specific components,and Detailed indicators are selected for the evaluation of each part of the difficult action.Therefore,under the guidance of synchronized swimming scoring rules,difficult movements have gradually become an important factor in the FINA l score of collective events.In view of this,based on the 2017 inter-version scoring rules,the top four teams in the16-18 3rd World Championships artistic swimming group event are combined in leg movements,upper limb movements,lifting movements,formation changes,difficulty placement and synchronization.The six aspects of the action are compared and analyzed.In order to improve the deficiencies in the arrangement of the difficult movements of collective events in my country,and to enhance the competitiveness in international competitions,it provides a certain realistic basis.This thesis adopts the method of literature data,interview method,video analysis method,comparative research method and mathematical statistics method to conduct related research.The main conclusions include:1.With the continuous updating and improvement of the FINA Synchronized Swimming Rules,the evaluation of the difficulty score of the group event has become more detailed,and the difficulty score has become one of the important factors that determine the FINA l score of the group event.2.In terms of the scheduling of difficult movements,the difficulty of the lower limb movements of the Chinese synchronized swimming team has shown a downward trend,which is mainly reflected in the obvious reduction in the number of high-risk movements.3.The upper limb movement has always been a weaker technical link for the Chinese team.Especially in the self-selected water propulsion,the upper limb movement of Chinese athletes is less demonstrated.Special swimming and kicking techniques are used as the main method of water propulsion.4.The lifting difficulty lacks diversity and innovation.When completing the second half of the self-selection,due to physical decline and collective cooperation,the lifting height is lacking.5.There is a significant gap between the frequency of formation conversion and the Russian and Japanese teams.When the formation conversion is completed,the lack of instantaneous explosive power of Chinese athletes results in the formation of the formation conversion not being fast enough.6.On the placement of difficulty,the Chinese team will concentrate most of the difficult moves in the beginning part,which is less in the middle and second half of the self-selection. |