Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13102-017-0075-z/MediaObjects/13102_2017_75_Fig4_HTML.gif)
Coefficient 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)