ld Says…

“The lats have two basic functions as far as bodybuilding is concerned: They pull the shoulder back (a rowing motion) and pull the shoulders down (a pulldown or chinning motion). A common mistake when doing these movements is to use too much biceps effort and not enough back, or to involve the muscles of the lower back in a swaying motion instead of making the lasts do most of the work. You have to make an effort when training lats to isolate them so that only these muscles are involved in the movement.”

Quote Source: Arnold Schwarzenegger’s New Encyclopedia Of Modern Bodybuilding