Few things can derail your biceps progress more than lack of exercise variety. There’s pretty much only one movement you can do for the bi’s (the curl), and doing only barbell and dumbbell curls can get stale. The lying cable curl is the perfect finishing move for a workout that also includes heavy barbell and/or dumbbell curls. Include this exercise on your next arm day and you’ll be a little less bored, and a lot more pumped in the biceps.