Well, six packs is healthy but difficult to sustain while growing old. I tried it while i was younger and i didn't get it, then someone told me i have a flexable muscle. First time hearing that. Most of my friends who feel i am lazy because i don't have six packs was surprise to see me doing heavy duty jobs they can't do even though they have six packs. So they asked me why i have no six packs and i told them i have flexable muscles like i was told. So my six packs won't show. That didn't mean i wasn't healthy. My advice, forget six packs and stay healthy with fruits and vegetables. Mind what you eat