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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.
Overpronation causes excessive internal rotation of the lower leg and knee and can affect the alignment of entire lower body. Overpronation places extra strain on the lower body and can cause foot pain (pain in arches, heels and ankles), knee pain, leg pain, and lower back pain. Overpronation can cause or contribute to poor knee tracking and knee pain. The kneecap slides over a groove on the thighbone as your knee bends and straightens. When the kneecap is pulled to the left or right of the groove while walking or running, it causes friction and knee pain on the underside of the kneecap.