STARTING POSITION:
Lie on the floor face down and place your hands slightly wider than shoulder width apart while holding your torso up at arms length. You need to find two fitballs and place them together in front of you. Support your weight on your toes and place your hands on the fitballs. Your hands should be just below your shoulders. Keep the shoulders far from the ears retracting your shoulder blades. Contract your pelvic floor and core while keep your body straight.
MOVEMENT:
Slowly move your body to the right and to the left keeping the balance. Keep moving yourself for the required time. Make sure your shoulder blades are always retracted.
TIPS: The exercise key is quality over quantity. The trick is to perform the exercise using proper form.