@theiconicjoyce__: How to actually grow your arms bigger fast with twisting dumbbell hammer curl. Keep the elbows pinned to your sides and your shoulders down to prevent momentum from assisting the movement, curl upward while smoothly rotating your wrist as you pass the 90-degree mark. #armsexercise #howtogrowarms #hammercul #dumbbellhammercurl #bestarmsworkout