Blache Y, Pairot de Fontenay B, Monteil K
a Centre de Recherche et d'Innovation sur le Sport , Université Claude Bernard , Lyon , France.
Ergonomics. 2014;57(11):1687-95. doi: 10.1080/00140139.2014.948495. Epub 2014 Sep 1.
The purpose of this study was to determine the influence of seat height and foot position in the sagittal plane on L5-S1 joint load. Fourteen healthy male adults stood up from a chair with three different seat heights and positions of the feet in the sagittal plane. L5-S1 net joint torque, mechanical work, range of motion and electromyographic activity of the erector spinae muscle were measured. L5-S1 net joint work increased by about 50% from high to low seat position. The mean and peak L5-S1 net joint torques increased about 30% from foot-back to foot-neutral position. These results were reinforced by a greater integrated electromyography signal from the erector spinae from high to low seat position and from foot-back to foot-neutral position. A high chair and placement of the feet behind the knees may be advisable to lessen lumbar load during sit-to-stand movements.
本研究的目的是确定矢状面内座椅高度和足部位置对腰5-骶1关节负荷的影响。14名健康成年男性从具有三种不同座椅高度和矢状面内足部位置的椅子上站起。测量了腰5-骶1关节净扭矩、机械功、运动范围和竖脊肌的肌电活动。从高座椅位置到低座椅位置，腰5-骶1关节净功增加了约50%。从足后位到足中立位，腰5-骶1关节净扭矩的平均值和峰值增加了约30%。竖脊肌从高座椅位置到低座椅位置以及从足后位到足中立位的肌电积分信号增强，进一步证实了这些结果。坐立运动时，使用高脚椅并将脚放在膝盖后方可能有助于减轻腰椎负荷。
