“…Foot pronation is evaluated with the foot posture index (FPI) [ 16 ] in relation to being a condition that causes kinematics changes in the lower extremity and increases the pelvic tilt, tension of the back muscles and lumbar hyperlordosis [ 17 , 18 , 19 , 20 , 21 , 22 ]. There is a lack of evidence on the effect of the custom-made foot orthoses in subjects suffering from CLBP and pronated foot to improve this syndrome by normalizing the foot posture [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”