Sit on seat in good body alignment (abs tight, chest up, back straight). Grasp handles and place back of upper arm on padding so that elbow is in line with the lever's fulcrum. Push lever down until arm is fully extended. Do not allow muscles to relax before next repetition.
Here are a few suggested alternative exercises:Ball Band French CurlBall Band Triceps KickBackBand KickBacksBand Overhead ExtensionBand Tricep ExtensionClose Grip Bench Press - BarbellClose Grip Dumbbell PressDecline Dumbbell Close GripDips - MachineDumbbell Lying Extension