They could advertise the cheesy way on TV.
Ab Wheel!!! Cavemen invented the wheel for this very purpose.
If you never have an Ab Wheel, then you can never have Abs!!! It's not rocket science, think about it loser.
Then they show you a 170lb lean dude, with a 6-pack, and a tatty long wig and some blackening around the face, Abs and Arms, to make you think he's a typical recreation of a Caveman, because clearly Cavemen got buff chasing their dinner around all day, sexing their Ladies and using an Ab Wheel the rest of the time
I hope Ab Wheel never goes that sleezy commercial.