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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.
Your Privacy Rights | About Us. Pronation. Pronation is the inward movement of the foot as it rolls to distribute the force of impact of the ground as you run. The foot rolls inward about fifteen percent, comes in complete contact with the ground, and can support your body weight without any problem.lthough pronation is a natural movement of the foot, the size of the runner's arch can affect its ability to roll, causing either supination (underpronation) or overpronation. If you have a normal arch, you're likely a normal pronator, meaning you'll do best in a stability shoe that offers moderate pronation control.