A pronated foot is one that rolls inward when walking or running and doesn't properly pass the weight over the foot. This creates a biomechanical problem that stresses the foot and lower legs. The knee and hip are affected as well because of the inward rotation of the legs. People with pronating feet are at risk for developing overuse injuries. Examples are ankle and Achilles tendonitis, shin splints, heel and kneecap pain, and heel spurs.
Flat feet are sensitive to overuse injuries such as stress fractures and tendonitis.
A sign of over-pronation is abnormal shoe wear. The right shoes can correct a problem. Wear stable shoes with proper arch supports and cushioning. The shoes should be designed for the activity and your foot problem. For example, running shoes would not be right for playing basketball because they are designed for forward motion.