The TherRex Balance Board is a functional trainer that allows for range of motion across all planes. Through it’s hemispherical shaped bottom, the balance board allows the user to exercise and strengthen their ankles in the positions which ankle sprains occur. Target muscles are activated up to 100 percent of maximal muscle contraction, so that injuries do not occur in the future. Mounting and dismounting the board is made easy with stops designed with a flat edge to increase stability. In the seated and prone positions, the stops will make sure the board contacts the ground before your fingers do. The board features two pairs of handles that surround the board to make it easy to use in seated and prone positions.