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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.
Symptoms of Underpronation. The most common symptoms of underpronation are pain through the arch of the foot or pain in the heel. In some cases, under pronation can also cause back pain and knee pain. As a result of the feetâs abnormal mechanics, stability may also become impaired since the feet are not hitting the ground in the way that they should.