Pronation is a normal foot function that actually allows the body and your feet to absorb shock. A certain amount of pronation is desirable to reduce shock forces exerted on the foot, knee, hip and back. When the pronation becomes excessive we typically refer to it as over pronation. If you are an over pronator, with each step you take you are over stretching the plantar fascia, which will ultimately result in stress or tearing the plantar fascia. Once this occurs the pain and inflammation are sure to follow. Over pronation is the number one cause of plantar fasciitis!