Sit or stand up straight, with a pulley to your side.
Step your body around 45 degrees away from the pulley so that it sits slightly behind you, closest to your arm to be exercised.
Ensure the handles of the pulley are around head height.
Hold onto the handles with each hand, and lower your arm to be exercised down to your side.
This will take your other arm up.
Making sure you are not leaning your body or hunching your shoulders, pull down with your elevated arm.
Allow your other arm to remain straight, as it travels diagonally forward and up.
Go as far as you can manage comfortably
Hold this position.
Control the movement as you bring your arm back down to the starting position, and repeat.
