Pope M H, Andersson G B, Broman H, Svensson M, Zetterberg C
J Orthop Res. 1986;4(3):288-97. doi: 10.1002/jor.1100040305.
The myoelectric activity of selected trunk muscles at the L3 level was studied during the development of a controlled isometric axial torque. Muscle activity was recorded with surface electrodes bilaterally over the erector spinae muscles, the rectus abdominus, the obliques externus, and the obliques internus. Subjects applied graded isometric axial torque efforts with the addition of a Valsalva. The largest myoelectric activities were recorded over the obliques externus and internus. The side of the muscle developing the torque did show the greatest myoelectric activity, but considerable antagonistic activity was also present. Neither the rectus abdominus nor the internal oblique muscles showed any difference from side to side. The calculated forces in the rectus abdominus and the erectores spinae were high, suggesting that a considerable amount of the muscle contraction was used to control the posture. A Valsalva did not decrease myoelectric activity, but did increase the torque developed.
在产生受控等长轴向扭矩的过程中，对L3水平选定躯干肌肉的肌电活动进行了研究。使用表面电极双侧记录竖脊肌、腹直肌、腹外斜肌和腹内斜肌的肌肉活动。受试者在进行瓦氏动作的同时施加分级等长轴向扭矩。腹外斜肌和腹内斜肌记录到的肌电活动最大。产生扭矩的肌肉一侧显示出最大的肌电活动，但也存在相当大的拮抗肌活动。腹直肌和腹内斜肌两侧均未显示出差异。腹直肌和竖脊肌计算出的力量较高，表明相当一部分肌肉收缩用于控制姿势。瓦氏动作并未降低肌电活动，但确实增加了产生的扭矩。
