A Study On Control Of Body Weight Of Adolescent Male Judo Athletes Before Competition

Purposes: The aim of the study was to monitor the physical function state of the pre-competition control weight athletes of Xi'an young men's judo team,and to understand the characteristics of the changes in the function state of the athletes in the stage of controlling weight period,and to help the coaches to improve the level of scientific training,ensure the health of the athletes and provide a guarantee for the athletes to achieve excellent results.Methods: Taking the eight key players of Xi'an Youth Men's Judo Team as the research object,in the weight control phase(2017.6.16-7.20)before the game,the physiological status and biochemical aspects of athletes' physical functions are monitored.The test includes body shape test(height,weight,BMI,body composition),exercise ability test(special aerobic exercise ability,special anaerobic exercise ability)biochemical index test(BLA,blood routine,urine ten items).During the period of weight control,morning and daily weights were tested;blood routine and urine were tested ten times a week for a total of four times;special exercise capacity was tested before and after the control weight.Results:(1)Biochemical indicators: During the process of weight control,all biochemical indicators showed a trend of first decrease and then increase,but there was no statistical significance.(2)Athletes' aerobic capacity(3000 m)before and after the weight control test,the scores of the 2000 m segment had a significant decrease(P<0.05);the heart rate had a significant decrease after 3 min(P<0.01);blood lactate was not Significant changes.(3)Special anaerobic exercise capacity test before and after weight control,SJFT exercise index and blood lactate change have a very significant decline(P <0.01).(4)Body composition: weight loss before and after weight control(P<0.05);body fat content decreased significantly(P<0.01);protein,muscle mass,inorganic salt and moisture did not have statistical changes.(5)Ten items of urine: The urine specific gravity and urobilinogen abnormalities are more frequent during weight control.The proportion of urine appeared 11 times,urine was found in 13 times,but it returned to normal after reexamination.Conclusions:(1)After the start of the weight control,the athlete's performance gradually decreased.After the body weight meets the requirements of the competition,the athlete's physical condition has recovered.(2)Athletes' aerobic exercise capacity and anaerobic exercise ability decreased after the control weight was over,but within the normal range.(3)The body composition of weight-reducing athletes is mainly body fat,which is ideal for weight control.Athletes achieve the purpose of weight control and achieve excellent results.