When standing, pronation occurs as the foot rolls inwards and the arch of the foot flattens. Pronation is a normal part of the gait cycle which helps to provide shock absorption at the foot. The opposite movement to pronation is supination. This is also a normal part of the gait cycle just after the heel strike however over-supination is also not good.
During our development, the muscles, ligaments, and other soft tissue structures that hold our bones together at the joints become looser than normal. When the bones are not held tightly in place, the joints are not aligned properly, and the foot gradually turns outward at the ankle, causing the inner ankle bone to appear more prominent. The foot moves in this direction because it is the path of least resistance. It is more difficult for the foot to move in the opposite direction (this is called supination). As we develop, the muscles and ligaments accommodate to this abnormal alignment. By the time growth is complete, the pronated foot is: abnormally flexible, flat, and its outer border appears raised so that as you step down you do not come down equally across the entire foot; instead, you come down mostly on the inner border of the foot. Normal aging will produce further laxity of our muscles that causes the pronation to become gradually worse.
Common conditions seen with overpronation include heel pain or plantar fasciitis. Achilles tendonopathy. Hallus Valgus and/or bunions. Patellofemoral pain syndrome. Iliotibial band pain syndrome. Low back pain. Shin splints. Stress fractures in the foot or lower leg.
At some point you may find the pain to much or become frustrated. So what are you options? Chances are your overpronation has led to some type of injury if there’s pain. Your best bet is to consult with someone who knows feet. Start with your pediatrist, chiropodist or chiropractor. They’ll be able to diagnose and treat the injury and give you more specific direction to better support your feet. One common intervention is a custom foot orthotic. Giving greater structural support than a typical shoe these shoe inserts can dramatically reduce overpronation.
Non Surgical Treatment
Overpronation of the feet can be corrected in some cases and in others it can be effectively managed. Overpronators can train themselves to change their running gait, wear arch supports, orthotic insoles or specialist shoes for overpronators. In order to determine exactly what is happening during the stride, it is necessary to have a gait analysis conducted by a professional. The extent of overpronation can then be determined, and the causes can be identified and corrected directly. The main corrective methods used for excessive pronation are orthotics. Orthotics are the most straightforward and simplest solution to overpronation. Orthotics are devices which can be slipped into shoes which will offer varying degrees of correction to the motion of the foot. Orthotics help to support the arches and distribute the body weight effectively, and are usually the best treatment choice for moderate to severe overpronation. Orthotics may require existing insoles to be removed from your shoes to accommodate them; although most running shoes will have a removable insole to accommodate an orthotic insole.
The MBA implant is small titanium device that is inserted surgically into a small opening between the bones in the hind-mid foot: the talus (ankle bone) and the calcaneus (heel bone). The implant was developed to help restore the arch by acting as a mechanical block that prevents the foot from rolling-in (pronation). In the medical literature, the success rate for relief of pain is about 65-70%. Unfortunately, about 40% of people require surgical removal of the implant due to pain.