Burdett R G, Habasevich R, Pisciotta J, Simon S R
Phys Ther. 1985 Aug;65(8):1177-83. doi: 10.1093/ptj/65.8.1177.
This study compared the joint moments and ranges of motion of healthy subjects and patients during rising from a standard chair with a seat height of 0.43 m and a specially designed chair (E-Z Up Artherapedic Chair) with a seat height of 0.64 m. Ten healthy male subjects and four male patients with lower extremity disabilities rose from each chair with and without the use of their upper extremities. Hip, knee, and ankle joint moments and angles were calculated with film analysis and force plate data. An analysis of variance with repeated measures showed the following results for the healthy subjects: 1) no effect of upper extremity use on joint angles, 2) no effect of chair type on ankle joint angles or moments, 3) significantly smaller hip and knee flexion angles with use of the E-Z chair than of the standard chair (p less than .05), and 4) significantly smaller hip and knee extension moments with use of the E-Z chair than of the standard chair (p less than .05) or with use of the upper extremities. Similar results were found with the four disabled subjects. Use of the E-Z chair can significantly decrease the joint moments and ranges of motion needed at the hip and knee and thus make rising from a chair less stressful to these joints.
本研究比较了健康受试者和患者在从座高0.43米的标准椅子以及座高0.64米的特殊设计椅子（E-Z Up Artherapedic椅）起身时的关节力矩和运动范围。10名健康男性受试者和4名患有下肢残疾的男性患者分别使用和不使用上肢从每把椅子上起身。通过影片分析和测力板数据计算髋、膝和踝关节的力矩和角度。重复测量方差分析显示健康受试者的结果如下：1）上肢使用对关节角度无影响；2）椅子类型对踝关节角度或力矩无影响；3）使用E-Z椅时髋和膝的屈曲角度明显小于使用标准椅子时（p小于0.05）；4）使用E-Z椅时髋和膝的伸展力矩明显小于使用标准椅子时（p小于0.05）或使用上肢时。4名残疾受试者也得到了类似结果。使用E-Z椅可显著降低髋和膝所需的关节力矩和运动范围，从而使从椅子起身时这些关节承受的压力更小。
