Resisted Shoulder abducted extension with external rotation in standing (Shoulder external rotation strengthening, into elbow extension, with band, standing)

Wrap one end of a long piece of a resistance band around each of your hands and thumbs.
Bend your elbows to 90 degrees with your palms facing down.
Start by rotating your palms up and spreading your thumbs and fingers wide.
Relax your shoulder blades gently back and down while turning your forearms outwards, keeping your elbows by your side.
Extend your wrists backward as you spread your fingers and thumbs even more.
Now start to extend your elbows, straightening your arms.