I'll give it a try and get back to you. Looks easy............. I know, I know, all ab work looks easy. Never heard of this one- will try it. I don't know squat about yoga. I don't think I'll be of much use for dueling. (But you never know -
Need to poke around the yoga link more.
Not sayin it is easy- only looks that way. Nothing looks easier than crunches. If these are worse I'm less comp than I thought.