STARTING POSITION:
Select the appropriate plates amount to put them on the bar. Stand up straight and grab the barbell with your hands in front of on either side of your hips. You should use a prone grip. Contract your pelvic floor and core while keeping your chest up.
MOVEMENT:
Lift the barbell up just above your head while you exhale. Make sure you don't bend the elbows during the movement. Return to the starting position in a smooth movement while you inhale.
TIPS: While your are doing the exercise, move only the arms, make sure you don't move any other part of your body. The exercise key is quality over quantity. The trick is to perform the exercise using proper form.