
isometric elbow flexion at 90 degrees with palm down, resisting further bend with opposite hand
Stand bending the elbow to 90 degrees with palm facing the floor and place the other hand on the forearm just above the wrist. Try further bending the elbow against the resistance of other hand. Hold before releasing the resistance and returning to starting position.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.