
Stand nice and tall with your arms by your side.
Slowly lift your affected arm to your side, with your palm opened and thumb positioned on the top. Raise your arm to 45 degrees first, and if you can tolerate this degree of abduction, raise it to no more than 60 degrees.
Ensure to keep your back straight and avoid leaning forward during the exercise. Concentrate on using your upper arm muscle.
Hold your arm in this position for a count of 5 and slowly lower it back to your side.
Aim for at least 8 to 12 reps.
Once the strength of your arm improves, you may challenge yourself by holding a 0.5 to 1 kg (1 to 2 lb) dumbbell in your hand and repeat the same steps.