The Correlation Of The Running Performance With Age And BMI Of Players Of 2014 World Cup In Brazil

Nowadays,the football matches are towarding to the derection of high-intensity and fast-paced.Running performance of players have an important effect to the result of the match.Therefore,it is necessary to analyze the relevant football matches data of World Cup timely,grasp the development trend of football matches accurately and scientifically in the future.This study used the methods of literature,mathematical statistics and so on,selected 365 players from 32 teams of 2014 World Cup in Brazil for the research object,according to the different positions of players to explore the correlation of running performance with the age and BMI,and revealed the rules among the research indicators.Research results are as follows:1.In the central defenders,there was no significant correlation between age and total distance covered,low,medium,high speed running distances,running distances with the ball and without the ball(P>0.05),but there was a significant low negative correlation between age and sprints(r=-0.228,P<0.05).There was no significant difference between the low age group and high age group of players in various types of running(P > 0.05).2.In the external defenders,there was no significant correlation between age and total distance covered,low,medium,high speed running distances,running distances with the ball and without the ball,sprints(P>0.05).There was no significant difference between the low age group and high age group of players in various types of running(P > 0.05).3.In the central midfielders,there was no significant correlation between age and total distance covered,low,medium,high speed running distances,running distances with the ball and without the ball(P > 0.05),but there was a very significant low negative correlation between age and sprints(r=-0.325,P < 0.01).There was no significant difference in the different types of running distance between low age group and high age group of players(P >0.05),but only in the sprints was significant difference(P < 0.05).Age has a certain effect on the number of sprint.4.In the external midfielders,there was no significant correlation between age and low,medium speed running distance,sprints and running distance without the ball(P >0.05),but there was a significant low negative correlation between age and total distancecovered(r=-0.349,P<0.05),and high speed distance(r=-0.355,P<0.05),and a very significant medium negative correlation between age and distance with the ball(r=-0.451,P<0.01).There was no significant difference between low age groups and high age group of players on total distance covered,low,medium,high speed running distance,and running distance without the ball(P > 0.05),but a significant difference on sprints(P < 0.05),a very significant difference on running distance with the ball(P<0.01).Age has a certain effect on the sprints and running distance with the ball.5.In the forwards,there was no significant correlation between age and total distance covered,low,medium,high speed running distances,running distances with the ball and without the ball(P >0.05),but there was a significant low negative correlation between age and sprints(r=-0.273,P<0.05).There was no significant difference between low age group and high age group of players in various types of running(P > 0.05).6.In the central defenders,external defenders,central midfielders,external midfielders and forwards,there was no significant correlation between BMI and various types of running distance(P > 0.05).Coaches should take into account the central and external midfielders' age in the lineup.Older players are experienced,but their abilities of sprint or running with the ball may deteriorate with age.Therefore,according to the players' own characteristics and tactical demands,to arrange the position of players,and maximize the running abilities.