國小高年級學童著地動作之分析

The Analysis of Landing Movements on Elementary High Grade Children

目的：本研究目的是以運動生物力學的觀點對高年級學童的著地動作進行分析。方法：以20 名國小高年級學童（平均年齡10.9±0.75 歲，身高141.7±7.4 公分，體重41.7±12.3公斤）為實驗參與者。本實驗是以Kistler 型號9260AA6 測力板 （120Hz） 及高畫質攝影機 （60Hz） 。針對著地動作進行分析，採樣參數包括：動力學（地面垂直反作用力之最大峰值、達最大峰值時間、斜率）、運動學（膝關節角度、下肢關節勁度）。結果：本研究參與者在著地動作上的最大峰值爲5.75 BW、達最大峰值時間為70ms、斜率為70.62BW/s、膝關節角度為132.60deg 以及下肢關節勁度為0.03BW/deg。結論：著地動作對國小高年級學童產生一定的負荷。若有相關運動介入上述參數是否會改變？是一值得探討的主題。

Purpose: this study is to analyze the landing movements on elementary high grade children.Method: the subjects are 20 children in elementary school the average age , height and weightare 10.9±0.75 year, 141.7±7.4cm, and 41.7±12.3kg. The main experiment equipment is the forceplate (120Hz, Kistler 9260AA6) and the high quality camera (60Hz) to collect the related data.The analysis is focus on the landing movement. The related parameters include: the dynamicparameters (the peak force of the ground reaction force, the time to the peak force, the slop of theforce) ; the kinematic parameters (the degree of knee joints and the stiffness of lower extremity) .Result: the related parameters of participants’ landing movements are: the 5.75BW in highestpeak force, the 70ms of time to the peak force, 132.60deg of the knee joints, and 0.03BW/deg ofthe stiffness of lower extremity. Conclusion: toward the elementary higher grade children, thelanding movements produce the certainly loading. If the related spots intervention, the relatedparameters will change or not? It is the worthy exploring topic.