Hold the ball out in front of you.
Take a large step forward into a lunge, bending through both your hips and knees.
As you lunge, take the ball to the outside of your front leg and touch it to the floor.
Continue to lunge by bringing the back leg through and taking the ball from one side to the other, always placing it on the floor on the outside of your front leg.
Perform this exercise keeping your body up straight with your core stability muscles tightened.