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Nov 16, 2007 - PronationBack
PRONATION
Definition:
Over-pronation, or flat feet, is a common biomechanical problem that occurs in the walking process when a person's arch rolls in or completely collapses upon weight bearing. This motion can lead to stress or inflammation on the plantar fascia and is associated with many other foot problems.
Cause:
There are many causes of flat feet. The most common type is associated with a biomechanical abnormality where the alignment of bone and joints is not correct. The body compensates for this in many ways, one of which may be to over pronate. As a result, over-pronation may lead to Plantar Fasciitis, Heel Spurs, Metatarsalgia, Bunions and a whole host of other conditions, which are discussed in details in other parts of this site.
Such misalignments are often subtle but can be more obvious. Examples include, leg length discrepancies, knock knees, tight calf muscles, dropped metatarsal(s) etc. Few people are aware that they over pronate until they get discomfort, mainly because the condition is congenital (born with) or has been present since childhood.
Over-pronation may also present in people who have flexible, flat feet – a condition known as general ligamentous laxity. The framework of the foot begins to collapse, as the ligaments are too elastic to maintain the structure, causing the foot to flatten and adding stress to other parts of the foot and body.
Other causes include obesity, pregnancy or repetitive pounding on a hard surface leading to a weaken arch.
The most common cause of acquired adult flat foot is posterior tibial tendonitis / rupture - the condition is discussed in detail under a separate heading.
Treatment & Prevention:
Over-pronation can be treated conservatively (non-surgical treatments) with prescription foot orthoses – this form of therapy is often very effective and can be combined with a stretching program, improvements in footwear, physiotherapy and postural training for maximum benefit.
The type and design features of an orthotic will depend on cause and nature of the over-pronation.
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