Abstract: A portable exerciser has a generally planar base for receiving a user's foot to be exercised and at least one resilient fastening member for flexibly fastening the user's foot to the base. The attachment member comprises a bar for attaching the resilient fastening member to at least one location on the base. When the resilient fastening member is attached to the base, it provides resistive force in opposition to movement of the user's foot and permits all of dorsiflexion, inversion and eversion exercise. The exercise apparatus can also include a force-bearing portion of the base so that a user can steady the base against movement with a non-exercising foot.