Have a $5 ab wheel that is pretty challenging to use. I see that some people use them in their conditioning.
I could see that it allows some pretty challenging core work espeically when rings aren't available.
I'm wondering what cross training benefit can they empart to the rings, if any?
The video at http://www.rosstraining.com/articles/wheel.html has some pretty good progressions ...
I like the pushups especially though probably can't do them (requires special wheels as well).
Thus far I'm able to get a partial but not complete motion from standing using the standard wheel.