Stand up straight facing a cable machine.
Hold one handle in the arm to be exercised.
Step back a little so that there is no slack in the cable when your arm is held directly in front of you.
Step your legs wider than hips width and soften your knees.
Keeping your gaze ahead, your back neutral and your abdominals strong, move your arm directly out to your side with your elbow soft.
Control the movement as you return to the starting position and repeat.
Ensure your body does not rotate with the movement.
Your arm should remain parallel to the floor throughout.