What is ball curl?

Ball curl

1. Lie on your back with your ankles resting on the ball, knees straight.
2. Look up at the ceiling, and keep your chin relaxed. You can place a small pillow under your head or neck for comfort.
3. Use your legs to roll the exercise ball toward you. Allow your knees to bend and move closer to your chest.
4. Pause briefly, and then roll the ball to the starting position. Try to keep the ball rolling straight. You will feel the muscles in your lower belly working.
5. Repeat 8 to 12 times.