健康幼儿投掷能力发展的运动学分析  

Kinematics Analysis of Throwing Ability for Healthy Infants of Three to Five

作　　者：关欣[1] 王新[2] 魏国[2] 谢艳春[2] 

机构地区：[1]沈阳农业大学,辽宁沈阳110866 [2]沈阳体育学院,辽宁沈阳110102

出　　处：《沈阳体育学院学报》2013年第6期85-88,共4页Journal of Shenyang Sport University

基　　金：辽宁省自然科学基金课题(编号:20102210);辽宁省高等学校杰出青年成长计划(编号:WJQ2011051)

摘　　要：为了探讨健康幼儿投掷动作发展的运动学特征,为促进幼儿科学地进行投掷练习提供理论依据,采用平面定点解析的方法,对2至6岁健康幼儿投掷动作进行运动学分析,并比较不同年龄其动作发展变化情况.通过研究发现：2～6岁幼儿在投掷动作发展中运动学特征性别差异逐渐增强;幼儿随着年龄的增长引臂和最后用力时肩、肘关节角度均有逐渐变大的趋势,4岁以后关节角度增加得愈加明显;4岁以后,物体出手瞬间幼儿有明显的屈腕动作,但随年龄的增长这种屈腕的程度在逐渐减小,这种改变可使物体抛出时出手角度更合理,增加抛出远度.The aim is to discuss the kinematic characteristics of the healthy children＇ s throwing movements, and to provide theoretical basis for improving infant throwing exercises scientifically. Using 2d camera and video analytical method,2 to 6 yearold healthy children＇ s throwing action feature are analyzed. The results show that sex differences are increasing gradu ally for throwing action of children aged 26. As children grow older,there is the tendency of the increase of ann raising, joint angle of both shoulder and elbow. This is especially obvious in angle increase of back joint of children over 4 years old. There is an apparent wrist bending when the object leaves hand, and this bending decreases as age grows. This change can make the parabola cover larger distance and height, and thus the object is thrown further.

关 键 词：健康幼儿 投掷 生物力学 运动学分析 

分 类 号：G804.66[文化科学—运动人体科学]