Why You Need A Ez Curl Brabell The zig-zag shape also creates greater range of motion that allows you to fully contract your biceps. With a close grip, you also won t need to use as much balance to keep the EZ curl bar steady. Another benefit of the EZ bar is greater activation of the humerus and brachioradialis (forearm) muscle groups. Versatile for Home Fitness The Olympic Barbell allows for a wide variety of workouts such as preacher bicep curling, triceps extension and bent over row. If you're hunting a curl bar for your home gym arsenal, don't miss this good value curl bar. Good training brings you a strong body and an optimistic mindset.