Set-up: With either a mini-wheel apparatus or barbell with small round plates, lie on the ground, resting on your knees, and grasp the handles or barbell.
Lift: Rollout as far as possible while maintaining tightness and stability in your abs and lower back. When you have reached full extension or can no longer maintain proper core position, return to the beginning.
Emphasis: Brace through the core throughout the entire movement. Discontinue before form deteriorates.