Kneel on the ground holding a barbell with two small plates on the end of it with a shoulder-width grip. Keeping your back flat, allow the bar to roll out in front of you as you extend your arms and torso to follow it. Go out as far s you can without arching your back, then use your abdominals to drag the bar back to the starting position.
Barbell Rollout (on knees)
Barbell Abdominal Exercises Hits: 2444