D.P.T., suggests swapping it out for the prone incline dumbbell curl. Simply flip the direction you're facing on a 45-degree incline bench and lie on it chest down with a dumbbell in each hand. Curl ...

"Fully extend and flex your arm on each rep. Try standing cable, dumbbell, barbell, or incline bench curls to encourage full range." If you think you need to lift heavy to fast-track results ...