Analysis Of Kinematic Features Throughout The Chinese Elite Athletes In The Women's 200 Meters Butterfly

ObjectiveFrom 1990 s,women's butterfly has been thought as one of the major and advantageous swimming event for China.This paper employs Dartfish 4.0,Swimming racesy software to conduct graphical analysis for the first 6 athletes of women's 200 m butterfly in the Swimming World Championships 2011,the first 3 athletes in the National Sports Games and the first three athletes in National Championships 2014.In addition,by using vertical comparison of athletes themselves and horizontal comparison of foreign outstanding athletes of women's butterfly,for Chinese athletes' strategies,this paper summarizes their characteristics and advantages,and also provides relevant suggestions and strategies to overcome their weakness,as the training reference for the Chinese women's 200 m butterfly event.MethodsMethods of location filming,image capture and analysis,mathematical statistics,literature review,expert interview were used and analysis four key techniques of starting,,turning,,the way swim,sprint.ResultsThis paper conducts analysis from the following four technical steps:1.Starting: analyzingthe time,speed and distance in the first 15 m underwater and the speed,frequency of stroke and length of stroke of the first two movement leaving water.2.Midway swimming: analyzing the average speed,the length of stroke and the frequency of stroke of every 5m distance.3.Turn: analyzing the distance and speed under water of the three turns and the speed,frequency of stroke and length of stroke of the first and second movement after leaving the water.4.Sprint: analyzing the speed,frequency of stroke and length of stroke of the last 5m.Compare to previous studis,this paper is more detailed and to find the pros and cons of butterfly athlete.Conclusions 1.Based on previous research methods,using more detailed professional analysis software for Chinese Women 200 m Butterfly athletes starting,turning,the way swim,sprint four key techniques are analyzed,it can more accurately reflect the above method the stability of the athletes during the race speed and technical action,has certain practical significance.2.Technical feature: Superiority:Compare with the outstanding foreign athletes:(1).The stability of our four athletes speed superior to foreign athletes.(2).Turn technology is better and with less time.(3).Stroke range is better than foreign athletes.Inferior(1).The speed of underwater swimming is slower and the join of first two movements afer out of water is not well.(2).Although Liuyang Jiao does not have remarkable speed among all periods,her capacity of keeping speed and stability plays an essential role for her to win.But the other three athletes' fluctuation of the average speed for every 5m unit is relative large and they are over fast during the first half,especially the first 50 m.(3).Our four Chinese swimming athletes are lower than foreign remarkable athletes: Liuyang Jiao and Zige Liu could improve the length of stroke and Mengyue Sun and Yilin Zhou are not as competitive as foreign athletes in frequency and length of stroke.