Lie on your back holding a stick across your body in each hand.
Your arms should be around shoulder width apart, or slightly wider depending on what is comfortable.
Using your unaffected hand to assist the movement, lift the stick directly up into the air.
Continue to raise the stick up and over your head, aiming to touch the floor above you.
It's ok if your elbows soften a little here.
Control the movement as you slowly lower your arms back down again, and repeat.