Back pain and differences in leg length
During normal gait, the action of repetitive supination and pronation create a shock absorbing effect and allow the foot to spring forward for the next step.
Lack of the ability to perform this motion will result in a "heavy" step without the required spring needed for toeing off. This can be the result of any fault in alignment or injury that the foot is forced to compensate for example bowed legs knock knees arthritic joints (bunions) etc.
The jarring created transfers to the low back causing pain and possible long-term damage.
Foot and leg malalignment can also be responsible for muscle strain occurring in the back and or sciatica due to compression of the sciatic nerve.
Leg length difference
There are two types of leg length difference. One is true, i.e. where the legs are actually different lengths. The other is acquired, where as a result of repetitive activity the person develops a postural leg length difference.
Both of these if not addressed over time can permanently change foot structure as it adapts to the new position. The change in structure creates an abnormal gait pattern with possible low back pain, hip pain, or sciatica.
All of the above can be assessed and treated by the podiatrist in this practice.