The alternating hammer curl is performed with dumbbells but without wrist supination. Throughout each rep, the wrists remain neutral, like a carpenter hammering a nail. It is generally performed for moderate to high reps, such as 8-12 reps or more, as part of the arm-focused portion of a workout.
Works not only the biceps but also the brachialis and brachioradialis
Less stress on the wrists compared to supinating curls