The management of ankle fractures is ... The terms adduction, supination, and inversion will be used synonymously, as will the terms abduction, pronation, and eversion -- except in the Lauge ...

However, overpronation happens when instability in your subtalar joint, where the bones of the heel and ankle meet ... underpronation (or supination) occurs when your foot rolls too far outward ...

Over-supination can put excessive stress on the ankle and toes and the outer edge of your foot, causing the ankle to roll or strain. And overpronation, when the foot rolls too far inward ...