Apparatus for exercising and/or rehabilitating an ankle

An apparatus for exercising the ankle, comprising a base frame, a seat support section attached to the base frame, and a seat adjustably mounted to the seat support section. The apparatus includes a foot carriage assembly comprising a foot carriage frame pivotally attached to the base frame for enabling plantar and dorsiflexion of the foot, a support arm pivotally attached to the foot carriage frame for enabling inversion and eversion of the foot, and a foot platform pivotally attached to the support arm for enabling abduction and adduction of the foot. A resistance system is operably connected to the foot carriage assembly for providing resistance against a force applied by a patient during use. The resistance system further comprises at least one weight stack, including a longitudinal weight rest and at least one guide rod attached to the base frame and extending through the longitudinal weight rest to enable the weight stack to maintain a vertical alignment with the base frame during use, and a complex pulley system operably attached to the foot carriage assembly for enabling the at least one weight stack to be raised and lowered in response to movement of the foot carriage assembly. The pulley system further comprises an abduction/adduction pulley system, a plantar/dorsiflexion pulley system, and an inversion/eversion pulley system.