SETUP: Take an underhand-grip (palms face you) or a neutral-grip (palms facing in). Both will engage your biceps a lot, but a neutral-grip will engage your forearms more and tends to place less stress on the elbows.
REP: Let your body hang down, but keep the muscles of your back engaged, as if trying to pull your shoulders down and push your chest up the whole time. Now curl your body towards the bars, and control the lowering phase.
TIP: Pull yourself up by squeezing EVERYTHING. This is not just a biceps exercise. If we try to perform this without fully engaging our entire body, we’ll create something known as “energy leaks”, and the move will be harder to do.