Performing the: A Step-by-Step Tutorial Barbell Curl
Keep your elbows close to your torso at all times, and maintain your upper arms stationary as you curl the weights while contracting your biceps.
Continue to raise the barbell until your biceps are fully contracted and the bar is at shoulder level. Hold the contracted position for a brief pause as you squeeze your biceps.
Slowly begin to bring the barbell back to original position as your breathe in.
Repeat this movement for the recommended amount of repetitions.