If the shoulder can’t rotate for strength, it will get injured. Far too many gym goers, athlete’s, and operators are on light duty or the bench from pec and shoulder injuries. The shoulder is a ball and socket joint, and it should be able to move freely and rotate while under stress. This exercise requires stability through the lats and a good amount of shoulder external rotation so the arm does not protrude forward. Doing too many of these is not necessary. Not practicing any rotation for shoulder strength is crucial for injury prevention of the rotator cuff and it’s stabilizer muscles such as the traps and deltoids. A common imbalance very skilled trainers observe is overactive upper traps which increases the risk of injury to the shoulder joint by pinching the bursa and cuff muscles which eliminates stability of the scapula. Thus, it should by said that rotation, stability, and using variability in training the anterior shoulder to limit injuries is commonly overlooked and not thought about enough in current high level programming. In short, fix yo’ shit. We can’t simply hit the barbell every time and expect injuries to not be there. Don’t be a robot, mix up your methodologies. Try 3 sets of 4-8 on each arm.