Orthotics can be a very effective part of a treatment plan for back pain. Force transferred from the feet up the legs to the hips can cause a misalignment of the pelvis and spine resulting in back pain.
Orthotics are most effective for individuals who have ankle or arch instability causing pronation or supination. Pronation occurs when the ankles and knees drop to the inside causing a rotation in the legs and hips. Exaggerated pronation looks like kids when they are learning to skate - blades sticking out sideways and their knees banging together. Conversely, supination occurs when the ankles roll outwards causing stress on the outside of the legs and hips. Exaggerated, it looks like a stereo-typical cowboy with bowed legs.
Orthotics reduce the amount of rotation at the ankles and stop the transfer of this rotation to the knees, hips and ultimately, the back. Foot orthotics are not applicable for all people with back pain so if you are unsure if they will help you, consult with your Physician