
isometric radial deviation exercise with self-resistance, performed seated with forearm supported and fist positioned thumb-up.
Sit on the chair, rest the forearm on arm rest such that hand is off the arm rest and thumb pointing towards the ceiling with making a fist, move the wrist towards ceiling. Place another hand on the top of fist, further move the hand towards the ceiling, against the resistance of other hand. Release the resistance and repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.