The Study On The Characteristics Of Segmented Tactics In Different Competitions Of High-level Middle And Long-distance Freestvle

The excellent performance is the starting point and end result of competitive sports,and tactics are the ways to participate in sports.Therefore,the selection and application of tactics play an important role in the realization of the goals.Long distance freestyle is the leading class of the physical endurance,and multiple rounds of competition system arrangement,not only requires the player to maximize fitness level,but also pay attention to the reasonable allocation,to ensure that the important races in athletic performance.Previous studies mainly from the single race time before and after the process model,the velocity distribution and velocity distribution results of velocity reserve index,the lack of in-depth study of different races segmented,failed to fully consider the athletes themselves and the opponent's play,the goal and behavior to match etc..Therefore,this paper mainly adopts the methods of literature,statistics,game viewing method and case analysis,the 2015 World Championships in Kazan,the 2016 Rio Olympics and 2017 World Championships in Budapest,200 meters of the top 8 athletes preliminaries,semi-finals and final results,400 meters,800 meters,1500 meters freestyle top 8 athletes the preliminary and final results as the research sample,summed up the characteristics of the speed race time of Olympic Games,world championships and other events of high level athletes,to explore the general feature of the long distance freestyle tactics of high level athletic,and came to the following conclusions:(1)In the 200 meter freestyle,there is a significant negative correlation between the first and the 3 and 4 segments of the men's athletes in the preliminaries and semifinals.Whether the male and female athletes are in the final,the speed retention after first periods of acceleration is an important criterion to determine the quality of the performance.Female athletes in each round,second,third,fourth achievement is a key to decide whether to enter the next round or get good rankings.(2)In the 400 meter freestyle race,the mean curve of the male and female athletes almost overlaps,and the velocity distribution is approximately the same.The phenomenon of"1 plus"in men's athletes may continue to speed up to about 50-100 meters.Female athletes of each segment of the correlation is bigger,more suitable to swim way uniform tactics,oxygen accumulation and energy conservation.(3)In the women's 800 meter freestyle swimming competition,the trend of the mean value curves in each segment of the preliminaries and finals is similar.The results of each segment of the finals are smaller than those of the preliminaries,that is,the speed is improved.In the final,the scores of each subsection are highly correlated with the subsections and the total results.Athletes use unilateral breathing technology to cause the correlation between segments to be higher than the adjacent segments,and different tactics should be adopted according to their own speed characteristics and opponent characteristics when breathing on both sides.(4)In the 1500 meter final,the journey on the road showed a slow rising trend.Every segment is significantly related between the big reason depends on the speed of the opponent pathway distribution and position,subtle changes in opponent's sense of urgency and pressure to the athletes invisible,the athletes produce weak changes in swimming speed.(5)In the long distance freestyle swimming,regardless of gender,level or race difference,the lower the competition level is,the better the competition performance will be.Suggestions are as follows:(1)High level coaches should strengthen the individualized time allocation mode of athletes,find out the segments with high correlation with athletic performance,and carry out intensive training accordingly,so as to improve their performance.(2)High level coaches and scientific research team needs in the contest before the analysis of the physical distribution and bypass opponent swim into the habit,to seek a breakthrough point to obtain higher scores or rankings.(3)High level coaches should cultivate athletes' tactical awareness,adjust their competitive and tactical changes according to their goals,and effectively use effective tactics according to their match styles and characteristics,so as to avoid passive psychological pressure.(4)High level coaches should pay attention to developing athletes' special speed and endurance training under high intensity,improve their sense of speed and exercise,and better allocate their physical fitness.(5)High level athletes should actively adjust their mental state.They should use psychological encouragement and presentation exercises to eliminate psychological burden and resistance,establish confidence in winning and lay a good foundation for winning.