Biceps are made of short and long heads. But there’s another muscle called the brachialis which lies underneath, that makes your bicep look bigger. To work that muscle, just stand feet and hands shoulder width apart, hands over the top of the bar, keep elbows tight to your body as possible and curl up. Make sure you use lighter weight because that muscle isn’t as strong as your bicep.

Watch as fitness expert and BPI Sports Co-Founder James Grage shows you how to do the reverse curl exercise!