How To Do A Barbell Bicep Curl

Stand with feet hip to shoulder width apart . Bend knees slightly. Point toes forward.
Tuck your chin, draw your abdominals in, and squeeze your glutes.
Grip bar slightly wider than shoulder width. Palms face up.
With arms fully extended, hold the barbell in front of the body.
Slowly curl barbell toward chest.
Reverse the movement and return to start position.
Repeat for the desired number of repetitions.
Do not allow the shoulders to round, back to arch, or chin to jut forward.
Avoid swinging the barbell.
Muscles worked: Biceps
Weight of a standard barbell: 45 lbs.
Modification: Replace barbell with a lighter body bar.

Irene Pastore Fitness.com