Hold barbell with an underhand grip, hand about shoulder width apart. Stand with feet shoulder width apart, arms hang down so barbell is in front of thighs. Stand up tall, abs pulled in and knees relaxed. You could also sit with arms hanging over a preacher curl bench with arms fully extended.
Bend arms and curl the bar up to your shoulders. Pause momentarily and then recover to the starting position.
Be prepared to assist at the movement arm of the machine or at the weights.
Points To Emphasize
1. Don't rock back and forth
2. Keep knees relaxed
3. When lowering the bar, lower under control to where your arms are almost straight