Sit on seat facing away from ball ramp. Place feet flat on floor. Hold medicine ball with both hands.
Rotate torso through waist to highest side of ball ramp. Place medicine ball on ramp. Release ball and turn to opposite side. Grasp ball as it travels to other side. Continue to transfer ball to highest side of ball ramp and catch it on opposite side. When finished, adjust ramp to opposite incline and repeat movement in opposite direction.
Start slow, gradually increasing ramp incline, speed, and range of motion. Using heavier ball will also increase difficulty of exercise. Perform prescribed repetitions or time. See Medicine Ball Seated Twist with partner. Also see Spot Reduction Myth.