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The Feasibility Study Of Increasing The Height Of The Table Tennis Net On Table Tennis Sports

Posted on:2020-03-23Degree:MasterType:Thesis
Country:ChinaCandidate:D RenFull Text:PDF
GTID:2437330602454296Subject:Physical Education and Training
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At the 2016 ITTF Annual Conference,the Swiss Table Tennis Association is required to install high-speed cameras in the 2016 Olympic Games or the World Tour to obtain data on at least 40 games in order to study the relationship between the height of the net and the number of hits.,to obtain data support for the heightening net.This research is based on the trend of the rules of the ITTF since the 21st century,and explores what changes will happen to table tennis after increasing the height of the net.This study mainly uses competition experiment method,video observation method,mathematical statistics method,three-stage statistical method and other methods to conduct research.The experimental design is a single group before and after the quasi-experimental design,and finally select 6 female second-level athletes as experimental subjects,6 The athletes conduct single-cycle competitions under the conditions of 15.25cm and 18.00cm respectively.The statistics of the overall characteristics and technical and tactics of the game at different heights of the net are used.Paired sample t-test and Wilcoxon test are used.The Pearson chi-square test and other methods were used for statistical tests.Through the research,the following results were obtained:after increasing the height of the table tennis net,the average time for each game increased from 3'13" to 4'03",p=0.041(p<0.05),and the average time per game increased significantly;The number of hitting boards is p=0.000(p<0.01),and the number of hitting boards per round after the heightening of the net is extremely increased.The square value of the teeing and non-producing of the different nets is 45.076,which is 0.000.The Clem coefficient is 0.195,and the statistical test power is 0.29,indicating that the probability of launching the ball is highly correlated with the height of the net is about 29%;the chi-square value of the lower spin and the non-turning ball at different heights is 20.835,p=0.000(p<0.01),it is proved that there is a correlation between the launching of the ball and the height of the net;the chi-square value of the upper side and the lower side of the hair side is 0.547,p=0.260(p>0.05),which proves that the hair side is up and down.There is no correlation between the height of the ball and the net.In the application of the receiving and receiving technology,the proportion of the control technology is reduced from 14%to 5%,and the application rate of the long technology is increased from 16%to 23%.The use of offensive technology "spinning,picking,and speed dialing" has dropped from 21%to 15%,and the use of the ball-lifting technique has been used from 18%.Increased to 25%.In the quality of receiving the ball,the proportion of direct and short scores increased from 3%to 15%,the proportion of attacked from 36%to 21%;the proportion of attacked by the length of the attacker fell from 68%to 49%,and the length of the attack was accused The proportion increased from 18%to 33%;the proportion of tapping,picking,and speed dialing increased from 12%to 23%,and the proportion of attacked fell from 43%to 24%.In the tactical change:the scoring rate of the squad is reduced from 60%to 54%after the net is increased,the usage rate is basically unchanged;the usage rate of the smashing segment is reduced from 39%to 35%,and the scoring rate and usage rate of the staves are Both have risen.Through the research results,we can draw conclusions:1.After the increase of the net,the game enjoyment is improved,mainly due to the increase in the number of games,the increase in the single game time,the increase in the number of hits,and the increase in the uncertainty of the game.2.After the net is raised,the direct score of the serve is more difficult,and the score of the grab is reduced.3.The attacking power of the serve after the ball is increased and the serve is weakened.The main performance is the reduction in the use of the offensive technology.4.Increasing the height of the net has little effect on the holding segment,but the overall evaluation level has increased.Finally,the paper puts forward suggestions from two aspects:macro system and micro training.
Keywords/Search Tags:Table Tennis Net Height, Table Tennis Competition, Female High Level Athlete
PDF Full Text Request
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