Very often I hear the terms "middle back" as well as "lower back" aside from the traditional "Lats" and "Traps" which are defined by their actual name and not something like "side back training" for example.
If I want to train the "Rhomboids" and "Teres major" which one would be the synonym for which...is Rhomboids the "middle back" and Teres Major the "lower back" or is it the other way around? Also the "Erector Spinae"...is this a synonym or part of one of the previous muscles? And where would it fit..Middle or low back?
Thanks.