Grab an E-Z Bar with a medium grip and palms facing up.
Stand tall, feet slightly wider than hip width apart, chest up, and shoulders down.
While keeping your elbows at your side, in line with your body, curl the weight toward your shoulders by contracting your biceps. Do not swing the weight or lean back to complete the lift.
Once the weight is at your shoulders, reverse the motion by letting the weight move away from your body and back to the starting position. Keep your elbows in line with your body the entire time.
Lower the weight until your arms are fully extended, pause, and repeat.