Over-pronation describes a characteristic gait wherein a lack of sufficient support from the arch of the foot causes it to roll inwards as weight is placed on it. The long arch of the foot is actually a very important structure in terms of our gait and how we walk, it is responsible for ensuring that as our weight rolls from the heel to the balls of our feet it does so in a straight line that doesn?t place undue stress on the ankle or knees. Unfortunately when a person?s arch is not pronounced enough, or even simply not there (a condition called flat footedness), there isn?t enough arch support to maintain a healthy, forward motion of the foot.
There is a relationship between biomechanics and injury that is specific to each body part. Overall though, poor mechanics will either increase the landing forces acting on the body or increase the work to be done by the muscles. Both increase the stress, which, depending on the individual and the amount of running can become excessive and cause injury.
In addition to problems overpronation causes in the feet, it can also create issues in the calf muscles and lower legs. The calf muscles, which attach to the heel via the Achilles tendon, can become twisted and irritated as a result of the heel rolling excessively toward the midline of the body. Over time this can lead to inflexibility of the calf muscles and the Achilles tendon, which will likely lead to another common problem in the foot and ankle complex, the inability to dorsiflex. As such, overpronation is intrinsically linked to the inability to dorsiflex.
Firstly, look at your feet in standing, have you got a clear arch on the inside of the foot? If there is not an arch and the innermost part of the sole touches the floor, then your feet are over-pronated. Secondly, look at your running shoes. If they are worn on the inside of the sole in particular, then pronation may be a problem for you. Thirdly, try the wet foot test. Wet your feet and walk along a section of paving and look at the footprints you leave. A normal foot will leave a print of the heel, connected to the forefoot by a strip approximately half the width of the foot on the outside of the sole. If you?re feet are pronated there may be little distinction between the rear and forefoot, shown opposite. The best way to determine if you over pronate is to visit a podiatrist or similar who can do a full gait analysis on a treadmill or using forceplates measuring exactly the forces and angles of the foot whilst running. It is not only the amount of over pronation which is important but the timing of it during the gait cycle as well that needs to be assessed.
Non Surgical Treatment
One of the best forms of treatment for over pronation is wearing supportive shoes. Shoes should have ample support and cushioning, particularly through the heel and arch of the foot. Without proper shoes, there may be additional strain on the tissue in the foot, greatly contributing to or causing an occurrence of over pronation. Rarely is surgery considered to relieve the pain and damage that may have resulted from this condition. Orthotic shoe inserts are often the easiest and most effective way to correct pronation.
Subtalar Arthroereisis. Primary benefit is that yje surgery is minimally invasive and fully reversible. the primary risk is a high chance of device displacement, generally not tolerated in adults.
An implant is pushed into the foot to block the excessive motion of the ankle bone. Generally only used in pediatric patients and in combination with other procedures, such as tendon lengthening. Reported removal rates vary from 38% – 100%, depending on manufacturer.