Why is it important that measurements are performed during unconstrained running and at the runner’s own pace?
Many studies have shown that a person’s running style on a treadmill is different from his normal running style. Usually the difference is not so great, but in some cases it can be quite dramatic. The deviation is different for each individual and not predictable. The treadmill is not well-accepted by most customers. Many are reluctant to use it, and for many it is simply too dangerous. Another reason is that often the treadmill runs at a different speed from what they are accustomed to. Since impact and pronation forces grow markedly with increasing running speed, a different running speed can result in the recommendation of a different type of shoe.
