- Hi, I'm Macy Mitchell, Personal Trainer and gym owner, and I'm here with the ab wheel from Stamina products, and I'm ready to show you how to use it. The most important this is to be aware of what your body's doing, especially your lower back. One thing that can happen with the ab wheel is people can overextend and arch their back too much, when in fact you need to stay in that tight, full engagement of the core position. Let me show ya'. So, first of all, you can start out, you're stacked with your arms, your arms are locked out. I'm gonna go out slightly, see what I'm capable of, and come back in small rolls.