Ab rollouts are a very effective core exercise using an ab roller. On your knees, firmly hold each side of the roller and extend your arms outwards moving your chest closer to the ground. Once fully extended, engage your core and bring your arms closer to your knees.

1. On your knees, firmly hold each side of the ab roller.
2. Extend your arms outwards, moving your chest closer to the ground.
3. Once fully extended, engage your core.
4. Bring your arms closer to your knees.