Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13047-015-0132-3/MediaObjects/13047_2015_132_Fig2_HTML.gif)
Example of pennation angle and muscle thickness measurement. Muscle thickness and pennation angle measurements of the TA muscle performed in the longitudinal plane
Example of pennation angle and muscle thickness measurement. Muscle thickness and pennation angle measurements of the TA muscle performed in the longitudinal plane