Ab Roller Will Seriously Work Your Core—Here's How to Use One
Why the Ab Wheel Is Such a Challenging and Effective Workout Tool | SELF
Ab Wheel Workouts: 50 Exercises to Stretch and Strengthen Your Abs, Core, Arms, Back and Legs: Knopf, Karl: 9781612432335: Amazon.com: Books
Amazon.com: Vinsguir Ab Roller for Abs Workout, Ab Roller Wheel Exercise Equipment for Core Workout, Ab Wheel Roller for Home Gym, Ab Workout Equipment for Abdominal Exercise (Black&Red) : Sports & Outdoors
Ab Roller Wheel Fitness Exercise Wheel Roller w/ Knee Pad for Abs Work – Gotta Haveit Super Store
How to Use an Ab Roller: 10 Steps (with Pictures) - wikiHow