Orthopedic massage is very specific work using cross-fiber friction, ice, heat and stretching to treat muscles, tendons, ligaments, and other connective tissue in the shoulders, hands, arms, and knees that has been traumatized by surgery, repetitive use syndrome, muscle or tendon tears, sprains and strains, tendonitis, and other causes. Emphasis is placed on understanding both the injury and its rehabilitation criteria. Orthopedic technique usually involves multiple sessions spaced within short intervals of days. The therapist may work in conjunction with the client's physician, chiropractor, or physical therapist. Clients learn self-care tasks to assist the healing process, such as icing the injured area, warm soaks, resting, stretches, and strengthening exercises.