Keep your shoulder blades back and down. This cue is applicable to almost every movement pattern in the gym, especially for pressing and pulling. For any horizontal pulling (seated cable rows) or vertical pulling (chin-ups), keeping the shoulders back and down will ensure your lats and mid back are being worked, as opposed to the upper traps and biceps. In the video, the first couple of reps are performed incorrectly and the last couple of reps are performed with the shoulders back and down. While it isn't necessary to start every pull with your shoulders back and down, you want to finish each rep in this position. – Akash Vaghela
