Study On The Structural Model Of 100m Swimming Sport Quality In The P.E Entrance Examination For Guangzhou Junior High School Students

In 2017,Guangzhou Municipal Bureau of Education added 100 m Swimming as a required item for the Sports examination of Junior High School Graduates' Academic Test and set the grading standards.Among them,boys full marks time standard is 1 minute 38 seconds,girls are 1 minute 45 seconds.(This standard is close to China's third-class athlete's grade standards).Therefore,difficulty of this project exams represented a serious challenge to the swimming sports quality of examinee.Researchers engaged in this field for a long time mainly focus on the research of high-level athletes.There are only a few studies on the sports exams item training system of Junior High School Graduates' Academic Test,hence,there is no a training and evaluation system that serves the junior high school PE entrance exam.The thesis takes the 100 m swimming sports quality of Guangzhou junior high school PE entrance examinee as the research target and uses the method of literature etc.we selected the representative indexes of the 100 m swimming sports quality characteristics and constructed a swimming sports quality structure after demonstrated by practice and theoretical analysis.The research results were listed as follows:1.The speed quality has a significant effect on the examinee's stroke rate and distance.The strength quality helps to improve the Stroke limitation of examinee's posture,the arm and leg movements in the water.The endurance quality determines that it is a water activity which mainly based on the anaerobic metabolism system and supplemented by aerobic metabolism;The flexible quality can increase the work area and efficiency of examinee's catching water,holding water and other swimming techniques;The coordination quality has a positive impact on the changes of the examinee's body position and direction in the water.2.The 100 m swimming sports quality index model of Guangzhou junior high school PE entrance examinee consists of 5 first-level indicators,6 second-level indicators and 10 third-level indicators.Among them,the first-level indicators and their weights are: speed quality(0.32),endurance quality(0.27),strength quality(0.22),flexibility quality(0.1)and coordination quality);Second-level indicators and its weight: displacement speed(0.24),strength endurance(0.23),aerobic endurance(0.21),rapid strength(0.16),special flexibility(0.09)and special coordination(0.07);Third-level indicators and their weights: 50 m swim(0.19),200 m swim(0.18),4x50 m strokes swim(0.14),4x50 m legs swim(0.14),15 m swim(0.1),Stretching shoulder(0.06),standing long jump(0.05),1 minute Prostrate both ends raise(0.05),sit and reach(0.05),1 minute skipping(0.05).3.Constructed a single score and comprehensive evaluation standard for the100 m swimming sports quality of Guangzhou junior high school PE entrance examinee.4.Taking Guangzhou junior high school entrance examinee who took part in the swimming test as the survey subjects,we made an empirical assessment of the present situation of the 100 m swimming sports quality and gave some improvement measures according to the existing problems.