
seated forearm supported wrist flexion using dumbbell with contralateral hand assistance for controlled range of motion
Sit on the chair, rest the forearm on arm rest with hand is off the arm rest such that palm facing towards the ceiling with holding a dumbbell. Using the asistance of other hand, move the wrist towards the ceiling, lower the hand to starting position and repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.