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利用Codamotion运动捕捉系统和Footscan足底压力测试系统,对111名7~11岁之间无明显身体缺陷和步行障碍的儿童进行测试,根据儿童的BMI指数,选取10组肥胖儿童及10组年龄、身高相仿的正常儿童,进行数据分析,研究其步行运动中,踝关节角度、膝关节角度、躯体前倾角度和头部前倾角度的周期性变化及差异,并分析其足底压力中心轨迹及步态时相的变化规律。研究结果表明:在摆动早期,肥胖儿童膝关节角度明显小于正常儿童;在前掌着地期,与正常儿童相比,肥胖儿童膝关节角度较小,膝关节曲挠程度较小;肥胖儿童的足底压力中心轨迹在x轴的变化范围,比正常儿童范围广,且沿足外侧方向的位移较大,说明肥胖儿童在行走过程中的稳定性较差,更易造成儿童时期的生理性足外翻。
Using Codamotion motion capture system and Footscan plantar stress test system, 111 children aged 7 to 11 years without obvious physical defects and walking disorders were tested. According to the children’s BMI index, 10 groups of obese children and 10 age groups were selected, The normal children with similar height were subjected to data analysis to study the periodic changes and differences of ankle angle, knee angle, ankle angle and head anteversion in walking exercise and to analyze the plantar pressure center trajectory and Changes of gait phase. The results showed that at the early stage of swinging, the angle of knee joint in obese children was significantly less than that in normal children. In the forefoot, the knee joint angle of obese children was smaller and the degree of knee joint flexion was smaller than that of normal children. Bottom pressure center trajectory in the x-axis range, wider than the normal range of children, and large displacement along the lateral direction of the foot, indicating that obese children in the process of walking stability is poor, more likely to cause physical foot eduction in childhood .