Using a bar attachment, the cable bicep curl provides constant tension on the biceps throughout the movement. This exercise effectively promotes muscle growth and strength by maintaining consistent resistance.

1. Stand in front of a cable machine with the bar attached to the low pulley.
2. Hold the bar with an underhand grip, keeping your elbows close to your sides.
3. Curl the bar towards your shoulders.
4. Slowly lower the bar back to the starting position.