Stand, facing cable, in good body alignment (abs tight, chest up, back straight) with feet in comfortable position. Grip bar (palms down) and position upper arms perpendicular to the floor with elbows bent at 90 degrees. Keeping back straight, slightly bend forward. In a controlled motion, keeping upper arm perpendicular to the floor, push bar down, until arms are approximately straight. Contract triceps fully, without compromising form. While maintaining the controlled motion, return bar to starting position. Do not allow muscles to relax before next repetition.
Great exercises for your triceps.