A unique ratcheting system on the Discovery™ Series Selectorized Line Rotary Torso easily adjusts the start position so users can move efficiently into their workout. Arm, seat, and back pad position secures the user and maximizes oblique muscle engagement. The unique ratchet system on the Rotary Torso allows the user to easily adjust the start position before entering the unit, or after sitting down. Arm, seat, and back pad positions help secure the user for maximized oblique muscle engagement.No workout is complete if only one side is worked. This unit provides resistance for rotation in both directions, providing a complete oblique workout.