He should be quicker in turn over ball and should be more discipline when defend. (justarsenal.com)
Place your stomach on a fit ball with your toes on the ground and your upper body out over the ball in a straight line. (womenshealthandfitness.com.au)
If possible, slowly roll over the balls of your feet onto the tops of your feet and shift the torso slightly forward. (yogajournal.com)