Biceps curls have many variations such as:

Barbell curls

E-Z bar curls

Dumbbell curls

Machine curls

Cable curls


Here are some bicep curl tips:

The key to the bicep curl is weight control. If you can't control the weight through the whole bicep curl, you may be lifting too heavy or too many reps.

Don't swing the weight up, or arch your back at the top of the bicep curl. Use correct control throughout the entire bicep curl to isolate your bicep muscles and hit them hard

To hit your bicep muscles extra hard, try limiting the range of motion slightly at the top and bottom of the bicep curl. This will keep your bicep tense through the whole set and won't give it a chance to "rest" at the top and bottom of the movement.