using a wide-grip places great emphasis on the fibers which line the chest, stretching all the way across to the outer pectoral. Even tho the chest is seen as major and minor, this exercise is effective for mass as well as stretch. It takes away from the workload of the tricep as well. Although this is great for targeting the chest in a unique and positive way, the shoulders are now placed under great stress, especially the ligaments. I do them, I love them but i'm careful not too take it too wide. More than where your pinky's meet the solid line on the barbell, but no more than thumb meeting that line.