Six packs or eight packs? It depends on your genetics and you cannot do much really even though you can make them look thicker.

Now for those who inspire to have that elusive ribbed body tone, you must have less than 10% body-fat. But the challenge is that our bodies don't care about low body-fat because it only cares about our survival.

Thus you need to have long term diet and exercise plan and discipline yourself to follow the plan. It is hard work men!