Stand in good body alignment (abs tight, chest up, back straight) with feet in comfortable position. Keeping arms at side, grip bar on angle (palms down). In a controlled motion, keeping upper arm perpendicular to the floor, curl bar up. Contract biceps fully, without compromising form. While maintaining the controlled motion, return bar to starting position. Do not allow muscles to relax before next repetition.
Here are a few suggested alternative exercises:Ball Band Biceps CurlBall Dumbbell Concentration CurlBarbell CurlBarbell Reverse CurlDumbbell Hammer CurlDumbbell Reverse CurlEZ Bar Curl