Fig. 4From: Are there two forms of isometric muscle action? Results of the experimental study support a distinction between a holding and a pushing isometric muscle functionCoefficient of variation (CV) of the mean amplitude of MMGobl. Illustrated is the CV of the MMG amplitude of the abdominal external oblique muscle between the three 15 s-measurements of all n = 10 subjects during HIMA (orange) and PIMA (blue) sorted by the difference of the CV between PIMA and HIMA (dashed line)Back to article page