I would like to know how to develop a split between my upper and lower pecs like Franco Columbu, the former Mr. Olympia? I saw a photo of him in a magazine and it really freaked me out to see that deep groove between his pecs. How did he develop it? How can I develop a split like Franco's?
It is purely a genetic thing.
Some people have diamond-shaped calves, some don't.
Some have peaked biceps, some don't.
Some can develop a split between their pecs, as Franco did. Most cannot. This is purely a case of either you have it or you don't.
Personally, I think it looks ugly. Why would you want ugly pecs?