Start on your hands and knees, with your hands under your shoulders, and knees under your hips.
Keep your back straight and your hips in a neutral position.
Place a ball by one hand.
Grab hold of the ball with one hand and hold on to it for the required amount of time.
Ensure your body and hips do not move throughout this movement.
Place the ball back on the ground and then pick it up with your opposite hand.
Repeat for the required number of repetitions.