Vanity is the mother of invention

If you go to a gym you’ll see more variations on the biceps curl than just about any other exercise. Curls in the squat rack, concentration curls, curls with cables, curls with dumbells, curls lying down, curls standing up, curls on an incline bench, preacher curls, EZ bar curls, curls on the medicine ball, ad infinitum. It’s ridiculous and it’s misguided. Curls are not the most effective way to train the biceps, and the amount of training most people engage in is counterproductive.