Resisted shoulder flexion (Shoulder flexion strengthening, with band, arm straight, standing; 02)

Take the band and step on it with one foot to create some tension.
Hold onto the band at the opposite end in your affected hand.
Start with your arm straight down at your side and the thumb pointing forwards.
Raise your arm forwards and up, keeping the elbow straight.
Make sure you do not hunch your shoulders as you lift the arm against the resistance.
Control the movement back down to the starting position and repeat.