How to exercise with a broken hand?

Aerobic exercise: I assume you have at least had a preliminary evaluation of your hand. You should not use any equipment that requires gripping with your hands for the moment, but you may still walk briskly for exercise. You should consult with a hand specialist (generally an orthopedic or plastic surgeon with specialty training in hand surgery) to understand when you may use your hand normally.

Difficult question: To answer without knowing more about your fracture, as in how old, in a cast, exactly what type/severity of fracture. In general, you should be able to utilize an exercise/stationary bicycle(more so a recumbent rather than an upright). If you are looking for input about how much upper extremity function you have, review this with the surgeon.