Svendsen D A, Matyas T A
Am J Phys Med. 1983 Feb;62(1):27-37.
Mean rectified electromyographic activity in vastus lateralis (VL) was recorded with surface electrodes during several Ss isometric maximum voluntary contractions performed in the PNF pattern of flexion-abduction-internal rotation, with the subject supine. The effects of longitudinally applied traction forces were compared in a within subject design employing latin square and counterbalanced presentation. Consistent with predictions, as traction force increased the group mean EMG showed a statistically significant increase. A brief survey using force platform measurements indicated that trained physical therapists tended to apply equal or greater forces than the 20 lb maximum used in the experiment.
在受试者仰卧位时，通过表面电极记录股外侧肌（VL）在以屈曲-外展-内旋的本体感觉神经肌肉促进（PNF）模式进行的几次等长最大自主收缩过程中的平均整流肌电图活动。在采用拉丁方和平衡呈现的受试者内设计中，比较了纵向施加牵引力的效果。与预测一致，随着牵引力增加，组平均肌电图显示出统计学上的显著增加。一项使用测力平台测量的简要调查表明，训练有素的物理治疗师倾向于施加等于或大于实验中使用的20磅最大值的力。
