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Kinematics of lower extremity for the young and elderly Chinese population during squatting

机译：蹲下时代青年人人口的下肢运动学

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The purpose of this study was to investigate the kinematics of the lower extremities of Chinese population during normal squatting activity. 25 young subjects (average age of 23.6 years) and 25 elderly Chinese subjects ((average age of 62.7 years) were recruited. With each subject's six trials data collected, the means of the three-dimensional (3D) rotation angles of the ankle, knee, and hip joints of two groups were calculated and analyzed. The statistical analysis showed that there are significant differences for hip joints and no significant differences for the knee and ankle joints between the two groups. The maximal eccentric range of hip flexion/extension of 90.1° for the young group (P<;0.01) was compared to that of 160.9° for the elderly group. Thus, the elderly enjoys more hip flexion/extension angles than the young, with the squatting posture assumed. The mean range of motion (ROM) of knee flexion/extension was 136.4° for the young group and 137.7°(P>0.05) for the elderly group. The mean ROM of ankle flexion/extension was 33.0° for the young group and 33.1°(P>0.05) for the elderly group. The ROMs available for us to obtain in the experiment during squatting were greater than the reported ones achieved after joint arthroplasty. These data may be valuable in establishing a standard of designing lower extremity prosthesis and assessing effect of rehabilitation for the Chinese population.
机译：本研究的目的是在正常蹲下活动期间调查中国人群下肢的运动学。 25名年轻科目（平均年龄为23.6岁）和25名中国科目（（平均年龄为62.7岁）。随着每个受试者的六个试验数据收集，三维（3D）踝部的旋转角度的手段，计算和分析两组的膝关节和髋关节。统计分析表明，髋关节有显着差异，两组之间的膝关节和踝关节没有显着差异。髋部屈曲/延伸的最大偏心范围对于年轻组的90.1°（P <; 0.01）与老年群体的160.9°进行比较。因此，老年人享有比年轻人更多的臀部屈曲/延伸角度，具有蹲姿势。平均运动范围膝关节屈曲/延伸的（ROM）为年轻组为136.4°，对于老年人，137.7°（p> 0.05）。踝关节屈曲/延伸的平均rom为33.0°，33.1°（p> 0.05 ）对于老年人。罗姆斯可供我们使用为了在蹲下期间获得实验，大于关节成形术后达到的报告的。这些数据对于建立标准设计下肢假体和评估中国人群的评估效果是有价值的。

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