Known as overpronation, the tendency of the arch to collapse while walking or running can cause serious problems not only in the feet but in the whole lower body as well. Using overpronation inserts in your shoes can help correct the problem and save you from significant pain and injury. Lower-cost inserts are fine for mild overpronators, but if you are at high risk for arch-related injury it is wise to pay extra for high-quality orthodic inserts. At their most basic, inserts simply slide into the shoe, while more advanced orthodics can be customized to fit your foot for the precise support you need. When choosing these inserts, it helps to consider if you need the inserts for athletics, general support, or to treat foot problems from diabetes.
A basic overpronation insert slides into any shoe and simply provides extra support in the arch area to keep the foot from wobbling. Inserts designed for athletic shoes may also provide some degree of shock absorption, which lessens the strain on the joints in the lower body. If you are buying the inserts for everyday use instead of athletic use, you may consider a heel cup instead of a full insert. Heel cups provide less stability, but are also less likely to be seen if you are wearing strappy shoes or sandals.
If you choose basic inserts, you should pay attention to the sizes available. Some brands of inserts come only in two sizes, regular and large, and are designed to be trimmed to fit the foot more exactly. If you have especially large or especially small feet, however, even trimming the insert might not be sufficient to make it fit you well. It would be best in this case to probably look for a brand that carries more sizes.
More advanced overpronation inserts may be necessary if you are overweight, especially active, or a severe overpronator, since these factors put you at higher risk for injury. One step up from a basic insert is a heat-molded insert. These overpronation inserts are heated in the oven and then molded to the shape of your foot for customized arch support. Most of these can be re-molded several times if you buy new shoes, since each pair of shoes fits slightly different.
If you have already received some sort of injury due to overpronation, such as plantar fasciitis, or if you have diabetes, you should consult a medical professional before buying any shoe insert. A podiatrist, physical therapist, or other specialist can help determine the exact cause of your injury and will have the best advice for how to prevent further injury. These professionals may also be able to provide you with fully customized orthodic insoles for the best possible support and control.