Hello! I have a question about breathing that I can't find the answer to.
In all the vocal schools / books that I've studied, the correct basic breathing technique is explained almost the same way: rib cage is expanded, breath comes from abs area without moving shoulders or rib cage up. But when I look at how different singers from popular rock bands take a breath when they sing - almost all of them have VERY noticeable shoulders movement up (and then immediately down) on each breath. Why? I guess they can't all do it in a wrong way, so is it some kind of advanced breathing technique that uses some back muscles causing shoulders to go up? Or what is it? Where can I find some detailed explanation?