To understand "overpronation" it's important to first understand pronation. Pronation is a normal function of the foot. It is the inward motion of the ankle bone and outward motion of the rest of the foot bones, which occurs naturally when the foot hits the ground and weight is applied. Pronation is a good thing; it cushions the foot and the entire body during the walking cycle. It keeps the foot and ankles protected from hard impact and an uneven ground surface. Overpronation occurs when too much pronation is present. In other words, overpronation occurs when the inward motion of the ankle bone is excessive and goes past the healthy point necessary for its intended functions. This excessive motion is caused by a misalignment between the ankle bone and the hindfoot bones. It creates an imbalance of forces and weight distribution in the foot that propagates throughout the entire body. Over time, this functional imbalance causes repetitive damage to joints, ligaments and bone structures. Left untreated, overpronation can lead to foot ailments such as bunions, heel pain (plantar faciitis), hammertoes, etc. Furthermore, the excessive motion in the foot can travel up the body and cause knee, hip and lower back pain.
It is important to identify the cause of overpronation in order to determine the best treatment methods to adopt. Not all treatments and preventative measures will work equally well for everyone, and there may be a little trial and error involved to get the best treatment. A trip to a podiatrist or a sports therapist will help you to establish the cause of overpronation, and they will be able to tell you the best treatments based on your specific degree of overpronation and the cause. Overpronation has many causes, with the most common reasons for excessive pronation listed, low arches, flexible flat feet, fallen arches, gait abnormalities, abnormal bone structure, abnormal musculature, bunions, corns and calluses.
Symptoms can manifest in many different ways. The associated conditions depend on the individual lifestyle of each patient. Here is a list of some of the conditions associated with over Pronation. Hallux Abducto Valgus (bunions). Hallux Rigidus (stiff 1st toe). Arch Pain. Heel Pain (plantar Facsitus). Metatarsalgia (ball of the foot pain). Ankle Sprains. Shin Splints. Achilles Tendonitis. Osteochondrosis. Knee Pain. Corns & Calluses. Flat Feet. Hammer Toes.
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
Mild cases of Overpronation may be controlled or corrected with a supportive shoe that offers medial support to the foot along with a strong heel counter to control excessive motion at the heel starting with heel strike. In mild cases with no abnormal mechanical pressures, an over the counter orthotic with heel cup and longitudinal or medial arch support to keep the foot from progressing past neutral may help to realign the foot. A Custom foot orthotic with heel cup and longitudinal arch support to help correct position of the foot as it moves through motion. Heel wedges may also assist in correcting motion.
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.