During the initial fittings, your prosthetist guides you through the basic principles of using your prosthesis, fine-tuning the fit and alignment as needed. For lower limb amputees, more extensive training (walking on different terrains, climbing stairs, getting in and out of a car) is provided by a physical therapist. If you have an upper limb prosthesis, an occupational therapist helps you perform daily living activities such as grooming, eating and handling various objects.