Medical Etiology: (information for health professionals)
Biomechanical aetiology:
A true flat foot is rare. Generally, a flat-footed person is only suffering from a functional flat foot caused by excess pronation. Excess Pronation causes the foots arch to collapse & elongate giving the appearance of a flat foot. A functional flat foot is quite common and generally exhibits symptoms ranging from sore/tired feet to general leg fatigue and body aches.
Treatment:
Orthotics control excess pronation by preventing excess calcaneal eversion during the contact phase of gait. This prevents secondary unlocking of the mid-tarsal joints during the mid-stance phase of gait which is commonly representative of Pes Planus.