Performing the: A Step-by-Step Tutorial Dumbbell One Arm Hammer Preacher Curl
Grab a dumbbell with one hand using a neutral grip (palm facing your torso) and sit on the preacher bench, placing the back of your upper arm on top of the pad, with your arm fully extended.
As you breathe in, slowly curl the dumbbell up while keeping the upper arm stationary, continuing the movement until your biceps are fully contracted and the dumbbells are at shoulder level.
Hold the contracted position for a brief moment as you squeeze your biceps.
As you exhale, slowly begin to bring the dumbbell back to the starting position as your muscles stretch. Repeat for the recommended amount of repetitions and then switch arms.