Flat feet over pronation is a common biomechanical problem that occurs in up to 80% of the population. This motion can cause extreme stress or inflammation on entire lower limb, pelvis and spine. There are many causes of flat feet. Obesity, pregnancy or repetitive pounding on a hard surface can weaken the arch leading to over-pronation. Often people with flat feet do not experience discomfort immediately, and some never suffer from any discomfort at all. However, when symptoms develop and become painful, standing, walking or running becomes awkward and painful. Over-Pronation is effectively treated conservatively (non-surgical treatments) with custom orthotics.