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The way your feet land when you run can cause serious injuries. Photo Credit iStock/Halfpoint. Underpronation, also known as supination, is a foot-positioning problem encountered by runners and other athletes who run during their sport.
Also called supination, underpronation can be thought of as walking on the outsides of the foot to an individually determined degree, though the intensity of the outward roll may be nearly unnoticeable to the observer at any moment.ince it is not always obvious to the layman, a simple test of looking at the wear on old walking or running shoes can be used to roughly diagnose underpronation. An underpronator's shoes will have more wear on the outside edge, particularly toward the rear, demonstrating the location of impact when running.