What causes over-pronation?
Over-pronation (hyperpronation) is a structural problem of the foot. The head of the talus (ankle bone) is slightly rotated up so it elevates the inside of the foot. This causes the inside of the foot to collapse when weight is transferred to the forefoot. This condition can easily be demonstrated by placing a persons foot in a position where the ankle is straight (the heel is perpendicular to the floor) and noticing how the first ray (first metatarsal and big toe) is no longer in weight bearing contact with the ground. When the forefoot is made weight bearing, the arch collapses and the ankle rolls in.
Over-pronation (hyperpronation) is a structural problem of the foot. The head of the talus (ankle bone) is slightly rotated up so it elevates the inside of the foot. This causes the inside of the foot to collapse when weight is transferred to the forefoot. This condition can easily be demonstrated by placing a persons foot in a position where the ankle is straight (the heel is perpendicular to the floor) and noticing how the first ray (first metatarsal and big toe) is no longer in weight bearing contact with the ground. When the forefoot is made weight bearing, the arch collapses and the ankle rolls in.
