I'll admit I got really tired of Ab Ripper X (and traded off with Core Max), but I'm very grateful for it now. That and Core Synergistics have really helped prepare me for the ab moves in STS Cardio. I had a learning curve because some of the moves were unique to me, but I could do them well by the end of the program. Froggie sit-ups and the roll-ups are now not a problem.
IMHO, STS Cardio is much more fun. But I'm glad for the preparation.
IMHO, STS Cardio is much more fun. But I'm glad for the preparation.