Sit upright in a chair with your hands relaxed by your sides.
Hold one end of a resistance band in your hand with the other end securely under your foot or tied around the chair.
Bend your elbow to 90 degrees.
Leading with your thumb, lift your weaker arm up.
Allow your elbow to straighten up towards the ceiling.
Hold this position before returning your arm back down to the starting position.
Ensure you do not hunch your shoulder during this exercise.
