First, lay on your belly, with your arm hanging off the side of the table towards the floor. Keep your hand in a neutral position, with your elbow straight.

You’re going to lift your arm, keeping your elbow straight, to as close to parallel to the floor as you can, at approximately a 45 degree angle overhead. Keep the thumb facing towards the ceiling towards the top of the motion.

And you’re done! That’s one rep. Repeat 10 times, or as much as your PT told you to.