Although biceps curls work to build the biceps muscles, according to Throwback Fit, they are a very ineffective exercise for this purpose. Muscle & Fitness suggests making small changes to biceps curls that make the exercises more effective.
According to Healthy Living, biceps curls work the biceps brachii, brachialis and brachioradialis muscles. Muscle & Fitness suggests increasing the effectiveness of the exercise by widening and narrowing the grip, doing biceps curls while seated or on an incline, doing hammer curls at a 45-degree angle and working with resistance bands. As more effective alternatives to biceps curls, Throwback Fit suggests pull-ups, chin-ups, bent-over and renegade rows, sumo deadlift high-pulls, and working out on a rowing machine.