DH and I have been doing ab workouts together, actually Denise Austin. He is an incredible runner. He can run 8+ miles on the high terrain of the Missouri Ozarks. Did a small hike with him and about passed out when he told me it was about 1/8 of the amount he usually runs! Well he is VERY fit, but he had only been doing sit ups/crunches at the gym and wanted to hit his abs better. He likes the variety of workouts of Denise Austin but I think he definately could handle something harder. He is the kind of person who loves a physical challenge. So I am buying the Ab Hits for us to do together. What one should I do first to give him the Cathe appreciation for WOW OUCH!!! Adding that since he has workouted out with me on these ab workouts he has new respect for my workouts, kinda like that!