I'll admit it: I did not know what I was getting myself into when I hit play on this Cirque du Soleil "Extreme Abs Workout." Wait, I hear you saying; Cirque du Soleil? Yep, the workout was ...

I knew it would be tough (my core quakes just thinking about the Cirque du Soleil Extreme Abs Workout I tried a few months ago), but I can honestly say I didn't expect to fully collapse after five ...