Attach a pair of resistance bands to a door anchor and place the door anchor overhead at the top of the door. Attach handles to the other ends of the resistance bands. Stand facing towards the door. Grab the overhead handles and keep palms facing in. Keep elbows at side.
Keep elbows as stationary as possible, bring handles down until arms are fully extended. As arms are extending rotate hands until palms face downwards. Return and repeat.
The elbow can travel up few inches at too of motion. Stay close to cable to provide resistance at top of motion.