Man doing broomstick external shoulder rotation exercise. man golding broomstick or pvc pipe to the side while grabbing other end to loosen up the shoulder. broomstick pointing down, arm bent 90 degrees. other arm grabbing end of stick. example image: https://images.squarespace-cdn.com/content/v1/5f5e8592d2b0854b18af6975/1646777378365-pi1tvstg31db8hc3kw56/dowel%2bexternal%2brotation.jpg?format=750w