Knimatics Research On Skills Of 9-18 Years Juvenile's Standing Long Jump

Objective: There are some important meaning to understand and appraise the level of development of juvenile`s movement skills in our country, also to guide the teaching disciplined through by researching the characteristics of age and sex of juvenile,s movement skills.Method: The researching is focused on 300 primary school and middle school students in Suzhou city, the skill of standing long jump of them were taken by JVC9800 high speed camera with 100 fps, the kinematics parameter of standing long jump skill of juveniles were meared by SIMI-motion video analytical system made in Germany.Results:1. The distance of standing long jump is increased followed the age, that means the age is older the distance is longer, and there are two sensitive specified time of increasing which is 13-14 and 17-18 years old. The level of skill of girls is increased followed the age before 14 years old, stop or decreasing after 14.2. The time using in each stages of standing long jump has no relationship with the distance of jump except the time of soaring up.3. When the child is completing the movement of standing long jump, there is a clear sequence existed in actions of joints. The boys before 13 years old is followed a sequence from the hip extending to knee and ankle, after that, they followed a sequence from the knee extending to hip and ankle, which is like the girls did.4. To contrast the skill of high level students and the low level students in same age, it shows that: The target of kinematics had remarkable during taking off and landing.