[ken]

> The same goes for abs. The first ten thousand set-ups you do just may give you that 6-pack abs you want, but another thirty thousand sure won't get you the 7-pack.

He picked the one type of exercise which doesn't really change. If you're lifting or running, you see increasing returns for a long time. You get stronger by lifting heavy weights, and you need to lift light weights to be able to lift heavy weights.

[GloriousKoji]

It's also a bad example because pack number is determined largely by genetics and visibility is largely determined by diet. Look at Arnold in his Mr Olympia days, he only had a 5-pack.