Schüldt K, Ekholm J, Németh G, Arborelius U P, Harms-Ringdahl K
Scand J Rehabil Med Suppl. 1983;9:174-88.
Knee joint loading and the level of knee muscle activation during rising exercises have been evaluated and methods have been developed for such studies. Floor-to-foot forces were recorded using a force-measuring platform. The loading moment of force representing the resistance for the knee joint was calculated. It was shown that the initial knee loading moment with much flexed knees was high at large knee angles. The loading moment showed a marked decrease with decreasing knee angles. For small knee angles there was no resistance to knee extension. Muscular activity level was studied using EMG. The levels of activity in the quadriceps muscles were high at large knee angles and low at small angles. The hamstrings and gastrocnemius showed only low activity. The magnitude of change in knee extension resistance due to adaptive adjustment of the exercise device was mapped. These rising exercises will increase strength mainly for large knee angles and only for quadriceps muscles.
在起身运动过程中，膝关节的负荷以及膝关节肌肉激活水平已得到评估，并且已经开发出用于此类研究的方法。使用测力平台记录从地面到足部的力。计算了代表膝关节阻力的加载力矩。结果表明，在大膝关节角度时，屈膝程度较大时的初始膝关节加载力矩较高。随着膝关节角度减小，加载力矩显著降低。对于小膝关节角度，不存在膝关节伸展阻力。使用肌电图（EMG）研究肌肉活动水平。在大膝关节角度时，股四头肌的活动水平较高，而在小角度时较低。腘绳肌和腓肠肌仅表现出较低的活动。绘制了由于运动装置的适应性调整而导致的膝关节伸展阻力变化幅度。这些起身运动主要会增加大膝关节角度时的力量，并且仅针对股四头肌。
