Smith standing back wrist curl

Stand facing the smith machine with your feet shoulder-width apart. Grasp the barbell with an overhand grip, hands shoulder-width apart. Keep your back straight and your elbows close to your body. Slowly curl your wrists upwards, bringing the barbell towards your body. Pause for a moment at the top, then slowly lower the barbell back down to the starting position. Repeat for the desired number of repetitions.