My goal goal for the past six months has been to get a six pac. I started with a bodyfat % around 22 and now its around 14%. I have been cutting for all these six months nad my stomich is deffanitly getting smaller. When shuld I start doing heavy ab excersises to build up my abs(I heard working the abs is basicly worthelss if there coverd by a lot of fat)? Now at 14% or shuld i wait untill im down to 12% or even 10%? Also what are some good ab exercises other than crunches and sit-ups(i dont know the name of the excersises, I need a description of what to do or a link to a website that tells me what to do).