Study On The Development Characteristics Of Movements Of The 7-12Years Old Children’s Sprint Mid-way Running

Child often is the most focus in motor development field. Developing basic motor skills is the most primary task in childhood. These motor skills are the basis of sports, games, and lifetime sports activities in the future. The basic movement skills include locomotion, non-locomotion and operation skills and running is one of the most common locomotion skills. It is cyclical movement which is done by two feet alternately as a strong point. Running can be divided into four parts of supporting phase, ahead driving phase, flighting phase and buffering phase.Due to the movement development is influenced by environmental factors, the rural primary school students were choosed as the research object in this article who were less affected by external interference. It is closer the development of running movement under the natural growth of children.Considering the funds and many other aspects, Zhao Zhuang elementary school in Gao Cheng was selected as research object after repeated research in this paper. The article focuses on the development characteristics of the sprint between the children aged 7-12 and analyzed. By the methods of literature material, expert interview method, test method, video analysis, mathematical statistics method of Gao Cheng 213 rural Zhao Zhuang elementary school children in the 50 run test, analysis of different age children run in every limb movement of movement characteristic, the whole movement characteristics of the movement types and distribution of the number of different ages, etc. The conclusion is as follows:1. Features of head movements: children aged 7-12 to maintain the integrity of nature; 7, 12 years old children head movements more excess.2. Features of upper limb movements:The upper limb of children aged 7 to 12 years from the left arm or the asymmetric arm around the arm to gradually transition development.3. Features of trunk movement: features of children aged 7-9 for integrity; features of children aged 10-12 is slightly forward.4. Features of lower limbs:①The support phase: The stage movement characteristic mainly displays in the swinging leg folding degree, the knee joint Angle and support legs on the landing site of part of the children aged 7 to 10 different degree of or so leg folding performance, as the natural growth of the age, in children aged 11-12 action is relatively stable, 11-year-old children forefoot support for development;②The backward stage: The stage movement characteristic mainly displayed in the swinging leg knee joint angle and pedal leg stretching extent, 10-year-old children left and right leg knee joint angle characteristics of different children aged 9 to 10 also leg strength development not balanced;③The flight phase: Before the stage movement characteristic mainly displayed in the swinging leg swinging amplitude and swinging leg knee joint Angle, after 11-12 natural forward movement development;④The landing: The stage movement characteristic mainly displayed in the swinging leg and support legs on the landing site of the knee joint angle, some children 12 years old before the soles of your feet on the ground.5. The type of 7-12 years old children run the whole movement features can be divided into eight kinds, more types of belong to 8,12 year old children.