45 years ago I re-started Boxing for the Corps. I had a weak abdomen so worked on the ABS. I did not have a 6 pack- It was solid muscle and I had a 28" waist. 4 years later and I stopped Boxing training and just kept fit with Soccer and running. The 6 pack went and a Belly came. It is still here no matter what I attempt to lose it. Good point for me is when I can use 32" trousers instead of 34"