anyone knows about this abs excercise and how effective it is?
As affective as body by jake.
Are you saying that it's as effective as a case of GH sold to you by Dave Palumbo?
Are you saying it is as effective as a Trey Brewer blow up doll with full functioning orfaces?
I'm saying that if "the Plank" was a bber, it would be Greg kovacs...........