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.
There are many biomechanical issues that can contribute to excessive pronation, including weak foot intrinsic muscles, limited ankle dorsiflexion mobility and calf flexibility, weak ankle invertor muscles (e.g. posterior tibialis), weak forefoot evertor muscles (peroneus longus), poor hip strength and control, Anterior pelvic tilting, heel InversionIn a person who overpronates, the heel bone goes into an everted position meaning that it turns out away from the midline of the body. The opposite motion of eversion is inversion. Inversion is a motion that needs to be controlled to prevent the foot from excessively pronating.
If you overpronate, your symptoms may include discomfort in the arch and sole of foot. Your foot may appear to turn outward at the ankle. Your shoes wear down faster on the medial (inner) side of your shoes. Pain in ankle, shins, knees, or hips, especially when walking or running.Unfortunately, overpronation can lead to additional problems with your feet, ankles, and knees. Runners in particular find that overpronation can lead to shin splints, tarsal tunnel syndrome, plantar fasciitis, compartment syndrome, achilles tendonitis, bunions (hallux valgus) patello femoral pain syndrome, heel spurs, metatarsalgia. You do not have to be a runner or athlete to suffer from overpronation. Flat feet can be inherited, and many people suffer from pain on a day-to-day basis. Flat feet can also be traumatic in nature and result from tendon damage over time. Wearing shoes that do not offer enough arch support can also contribute to overpronation.
If you cannot afford to get a proper gait analysis completed, having someone observe you on a treadmill from behind will give you an idea if you are an overpronator. It is possible to tell without observing directly whether you are likely to be an overpronator by looking at your foot arches. Check your foot arch height by standing in water and then on a wet floor or piece of paper which will show your footprint. If your footprints show little to no narrowing in the middle, then you have flat feet or fallen arches. This makes it highly likely that you will overpronate to some degree when running. If you have low or fallen arches, you should get your gait checked to see how much you overpronate, and whether you need to take steps to reduce the level to which you overpronate. Another good test is to have a look at the wear pattern on an old pair of trainers. Overpronators will wear out the outside of the heel and the inside of the toe more quickly than other parts of the shoe. If the wear is quite even, you are likely to have a neutral running gait. Wear primarily down the outside edge means that you are a supinator. When you replace your running shoes you may benefit from shoes for overpronation. Motion control or stability running shoes are usually the best bet to deal with overpronation.
Non Surgical Treatment
Although there is no actual cure for over-pronation it is possible to correct or at least reduce this problem. In order to restore our normal foot function an ‘orthotic’ or orthotic insole device is placed inside the shoes. Orthotics are designed to realign the foot and ankle bones to their natural position. This in turn restores our normal foot function and it helps alleviate not only foot problems but also ailments in other parts of the body i.e. the legs, knees and lower back. In addition to wearing an orthotic, it is recommended to wear supportive shoes, like good quality athletic footwear with a firm heel counter and sufficient flexibility in the forefoot area.
Many of the prevention methods for overpronation-orthotics, for example-can be used interchangeably with treatment methods. If the overpronation is severe, you should seek medical attention from a podiatrist who can cast you for custom-made orthotics. Custom-made orthotics are more expensive, but they last longer and provide support, stability, and balance for the entire foot. You can also talk with a shoe specialist about running shoes that offer extra medial support and firm heel counters. Proper shoes can improve symptoms quickly and prevent them from recurring. Surgery can sometimes help cure and prevent this problem if you suffer from inherited or acquired pes planus deformity. Surgery typically involves stabilizing the bones to improve the foot?s support and function.