Abstract
Antagonist coactivation levels of trunk muscles were determined quantitatively using three coactivation measures: the sum of antagonist NEMG, the sum of antagonist force, and the sum of antagonist moment. Twelve male subjects performed isometric voluntary exertions gradually increasing to maximum efforts in six directions: flexion/extension, left/right lateral bending, and clockwise/counter-clockwise twisting. Coactivation levels were assessed at 10, 20, 30, 40, 50, 60, 70, 80, and 90% MVE in six directions. Antagonist coactivation was dependent on the magnitude and direction of the exertion moment, while it showed different patterns according to the coactivation measures. Twisting moments induced highest coactivation in all three measures.
Get full access to this article
View all access options for this article.