Ross Enamait from rosstraining.com once inspired me by one of his videos to include ab wheel training into my workouts. I followed on of his instructional articles to build my very own ab wheels of lawnmower wheels. I started doing the rollouts on my knees, one knee, weighted on the knees and one arm rollouts from the knees.
I was ready to progress to standing ab wheel rollouts!
Ross shows standing ab wheel rollouts, progressung using a ramp in this video.