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首页> 外文期刊>Journal of Biomechanics >CHANGES IN THE LOWER LEG MOMENT OF INERTIA DUE TO CHILDS GROWTH
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CHANGES IN THE LOWER LEG MOMENT OF INERTIA DUE TO CHILDS GROWTH

机译：鸡生长引起的下肢惯性矩变化

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During growth the size and shape of the child's body changes. It is not clear whether the shape of a body segment changes proportionally in children between the age 5 and 18 years. The aim of this study is to describe these changes for the lower leg moment of inertia in a population of children. The segment moment of inertia describes the mass distribution along the body segment axis. The moment of inertia of the lower leg (including the foot) was measured by the free oscillation technique in 90 healthy children(61 boys and 29 girls) between 5 and 18 years of age. The period of free oscillation was measured with and without external mass loading. The moment of inertia was calculated using a relation between the mass and the period of oscillation. A two-cylinder model of constant body density was used to predict the moment of inertia. Anthropometric measurements of length of the lower leg and foot, the circumference of the knee, ankle and foot were made. Experimental and model data of the lower leg of inertia were described by a fifth power function of body height. The experimental and model data showed high degree of convergence, confirming that the segment growth of the human body can be treated like the volume growth of a cylindrical object of constant body density. Thus it was experimentally confirmed that the lower leg segment growth between age 5 and 18 years may be considered as proportional. (C) 1997 Elsevier Science Ltd. [References: 21]
机译：在成长过程中，孩子身体的大小和形状会发生变化。目前尚不清楚5至18岁儿童的身体节段形状是否按比例变化。这项研究的目的是描述儿童群体中小腿惯性矩的这些变化。段的惯性矩描述了沿着身体段轴线的质量分布。通过自由振荡技术测量了90岁5至18岁健康儿童（61名男孩和29名女孩）的小腿（包括脚）的惯性矩。在有和没有外部质量负载的情况下测量自由振荡的周期。利用质量和振荡周期之间的关系来计算惯性矩。使用恒定密度的两缸模型来预测惯性矩。人体测量小腿和脚的长度，膝盖，脚踝和脚的周长。小腿惯性的实验和模型数据由身高的第五幂函数描述。实验和模型数据显示出高度的收敛性，证实了人体的节段增长可以像恒定密度的圆柱体的体积增长一样对待。因此，通过实验证实，5至18岁之间的小腿节段增长可以认为是成比例的。 （C）1997 Elsevier Science Ltd. [参考：21]

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