Sit upright in a chair with your arms by your sides.
Bend your elbows, and hold your hands with your palms facing up.
Hold the band loosely in your hands with it wrapped behind and around the outside of your affected hand.
Turn your affected hand so your palm faces the floor without putting a stretch on the band.
Once you have done this, use your opposite hand to stretch the band.
Slowly and controlled, turn your forearm so that that your palm faces the ceiling again.