A perfectly executed pull-up looks crisp and smooth and has been known to induce excessive gawking from onlookers. Besides radiating to-the-bone badassery, this exercise is arguably the ultimate measure of upper body strength.
Think about it: how many folks do you know who can bust out a set of 10 pull-ups with perfect form? What about weighted? People who can do them with perfection, you may have noticed, tend to be leaner and more muscular than the average gym-goer. This is no coincidence.