Want to build bigger biceps? You need to train the long head and the short head of the biceps. Here's an effective workout to help you target both heads. First, we're going to target the long head with incline dumbbell curls. Keep your upper arm vertically straight to keep the tension on the biceps. Next, we're going to hit the short head with easy bar preacher curls. Ensure you lower the weight until your arms are fully extended to emphasize the stretch on the biceps. Third is barbell curls to target the overall biceps.