How To: Stability Ball V-Up
1.Lie face up on the floor with arms and feet extended, grasping a stability ball with both hands.
2.In one fluid movement, use your entire core to lift your arms and legs off the ground, keeping legs and arms straight the entire time.
3.Transfer the ball from your hands to your feet and allow yourself to lower back down to the floor. Repeat passing the ball back and forth as many times as possible during the number of reps.