Performing the: A Step-by-Step Tutorial Cable Curl
Grasp the bar with an underhand grip (palms facing upward) and your hands shoulder-width apart.
Keep your elbows close to your torso and curl the weights while contracting your biceps, keeping the rest of your body still.
Continue to curl the bar until your biceps are fully contracted and the bar is at shoulder level. Hold the contracted position for a moment as you squeeze your biceps.
Slowly begin to bring the bar back to original position as your breathe in. Repeat for the recommended amount of repetitions.