Miles: Thank you so much for taking the time to post your file on the
ab wheel. What a fantastic example of clear descriptions, pictures
and diagrams. I bet you provided way more information and practical
examples from real use than comes with the equipment. Now I'm all
excited to buy one and give it a try.

I'll definitely be starting with the easy variation. But with your
document I will know how to move up in steps to the harder version.

How to bring this back to the XF equipment? Here's my thought. I
could do the XF ab exercise (which doesn't do much for me for building
muscle) to *measure* my ab strength. Then I could try the ab wheel
for a while and then go back to the XF equipment to measure again.
That will help tell me in concrete terms if the ab wheel is doing
anything for ab strength.

Thanks for your efforts!
- JJ