Fix the rope attachment to a pulley machine and get ready to apply a simple external rotation to maximize contraction quality on this triceps exercise. But first, I cannot emphasize enough how important it is to keep your shoulders back and lock your elbows in position.
As you pull the rope down with a neutral grip, turn your palms toward the ground so that your hands externally rotate, as if you were spreading the two ropes further apart. This places more stress on the triceps and lets you fully reap the benefits of this exercise.