The symptom of oversupination is usually a high, rigid arch. Oversupination of the feet is a relatively uncommon misalignment.
Supination is a natural movement that occurs when an ankle rolls outward and the soles of the feet roll inward toward the body’s midline.
Many people believe that oversupination is preferable to pronation, the much more common foot misalignment.
However, all types of misalignment have repercussions, the most important being catastrophic failures such as stress fractures and, to a lesser extent, tissue strain through distorted weight-bearing body parts.
What causes oversupination?
Oversupination occurs when there is a dominance of the muscles that invert the foot – especially, the tibalis anterior.
The side-to-side mobility of the feet and ankles is controlled by inverter muscles that cause the sole of the foot to face inward towards the body’s midline and evertor muscles that cause the sole of the foot to face outward. These muscles pull against each other.
In most instances, the evertor muscles have been conditioned to be inactive and are unable to balance the foot alignment against their antagonists, the invertor muscles.
In this case, the body is unable to create and maintain an ideal dynamic arch system.