Schematic view of the experimental setting. Schematic view of the experimental setting showing a specimen mounted rigidly on the experimental jig in anatomical position. A: representation of the LVDT placed in the prolongation of the action line of different muscles. B: tibial 3D electrogoniometer. C: illustration of the loading muscles, RF, VL and VM by cerclage with metallic wires. D: representation of the fixation of the other muscles according to the bull's method.