I am training for about 6 months and I train my abs regularly. Its enough time to appear six packs. Should I use weighted crunches. I used them a week ago and it improved my packs a lot. Upper packs started to appear a bit but I have heard that using weights on crunches can widen your waist, is this true.Remember when I started training I was not a fat guy, I was a skinny guy and I use to have good midsection but even at that time i didnot have six packs.