A Study On The Changing Characteristics And Influencing Factors Of The 50 - Meter Race Performance Of Junior Middle School Students In Hefei City

In this paper, literature, tests, interviews, questionnaires, mathematical statistics, 50 meter Race and the change in Hefei characteristics and factors affecting junior high school boys to explore. Select the forty-fifth high school in Hefei, Changfeng County Commissioner Dun junior high schools and two-test schools, its first day, two days, three days of each grade 30 boys (random) 50-meter run were carried out before and after three test, by observing the contrast all grades three secondary boys 50 m achievement trends, explore Hefei junior boys 50 meters Race and the variation. At the same investigation and analysis of Hefei junior boys 50 meters run performance factors from students, families, schools in three aspects. Finally, summarized the relevant issues, make recommendations accordingly. This not only increases the theoretical content related to junior high school students rate the quality of development, but also on the quality of scientific training junior boys speed to provide some practical guidance.The results showed that:1. Hefei junior boys 50 meters Race and the variation mainly for natural growth, stage, incremental, instability, imbalance. Overall stage of rapid development, but due to differences in the age difference, the region showing students different segments have significant differences.2.50 m running performance change width urban - rural junior high school boys and there is a serious imbalance between, on a 50-meter Race and the total magnitude of the growth in urban than in towns.3. Effect of Hefei junior boys 50 meters run score change many factors, mainly the internal and external aspects, internal factors, mainly the students themselves factors, including family history, body shape, individual sports consciousness and behavior; external factors include family factors and school factors. Factors that these aspects are interrelated, and the combined effect of the speed of development of these qualities of students.4. Hefei, students and parents recognize the importance of the sport is still insufficient, sports consciousness is relatively weak, while the level of participation in sport is also quite lacking, there is no good exercise habits, the need to strengthen support for the sport from the thoughts and actions and participation.5. Different economic levels of Hefei City and towns of investment and attention school sports infrastructure there is a big gap, leading to the development of urban and rural students there is a big difference in speed quality and other aspects.