PMC5267078_01
From the left hand side, (a) the anatomical representation (posterior view) of the hip extensor muscles taken from BioDigital Human (https://human.biodigital.com); (b) the model in the anatomical position (lateral view) including the muscle and hip forces (in green); and (c) the range of hip flexion angles investigated.
JOS2017-5219541.002.jpg
PMC5267078_01_JOS2017-5219541.002.jpg
fig2
The range of the hip flexion angle (i.e., -20 -100  hip flexion angle) was explored using fifteen intermediate angles (Figure 2).