ive been going to the gym for a little over a month now and im trying to build a 6pack. the only ab workouts I do is where I do crutches on one of those huge balls. I can see my upper abs starting to pop out, but the lower ones just arent there yet. I do have a small gut which I am slowly shrinking as well. I was wondering if anyone could tell me the types of excersizes needed to train lower abs. Thanks.