Performing the: A Step-by-Step Tutorial Seated Preacher Curl
Grasp an EZ bar or dumbbells with an underhand grip, palms facing upwards, and sit down on the preacher bench, placing your upper arms on the padding and extending your arms fully.
Keep your elbows stationary, curl the weight up by flexing your biceps, until your forearms are vertical and your biceps fully contracted.
Hold the position for a second, squeezing your biceps at the top of the movement.
Slowly lower the weight back to the starting position, fully extending your arms and stretching your biceps, then repeat the movement for the desired number of repetitions.