Instructions
Set up a cable station with a straight bar attachment connected to the low pulley.
Stand close to the station, feet shoulder width apart either side of the pulley.
Grip the bar with a shoulder width underhand grip.
Keep your elbows close to your sides.
Curls your arms upward from the elbows in a smooth arc.
Continue until your forearms are vertical with your palms facing your shoulders. Hold for a count of one while flexing your biceps.
Lower the bar back to the starting position in a smooth motion.
Repeat.