I was doing some major summarizing. I basically repeated a small portion of what the book says for Standard Grip bench press, it goes into more detail on variated bench press movements like close grips, incline, decline.
I was also unaware of the ability to isolate portions of the pectoral muscle, but this book clearly states that these variations will shift emphasis to that part.
I have two opinions on this: 1. Because its written in a book, assuming it must be true is fallacy. 2. Everytime I have heard someone state that you cant "isolate" certain portions of the pec they have never backed it up with a study - it seems like strongly opinionated hearsay to me.
Here is a
link for the book. It is a very in depth book, and I do recommend it.