What comes to mind when you think of getting killer abs? Crunches, right? Maybe a plank just to spice things up?

Well, no wonder you are getting bored and that washboard six-pack is alluding you! Grab a swiss-ball (yes, that big blue one that looks like a beach-ball) and try out this core routine. It will keep you interested and work abdominal muscles you didn’t even know that you had!