The Role of Line of Pull in Muscle Training

The pecs are unique in that there is some orientation of the fibers that lines up with humerumotion. So even if you're doing like straight up through reflection, that's not exactly in line with the quote unquote Orientation of the fibers since the pecs go from the clavicle down right into the humerus. Oh, and then to add to that, that's how when they do line of action line of pull,. They're trying to determine what has leverage at those joint angle ranges of motion.