However, it may also occur in other jobs, such as on assembly lines. Tennis elbow can be an occupational injury as well, occurring any time one repetitively twists one's wrists. This movement is often done in packing plants, for example, as workers twist products into containers. Patients who have an occupational injury are often put on light duty. Another method used by physiotherapists for those with chronic airways disease is called clapping and postural drainage. The postural drainage part is done by positioning the body so that the affected lung is above the trachea. Many people do this at home by lying on a bed and bending the top half of the body over it. The HBOT can sometimes revive them. Pediatric disorders such as sports injuries and traumatic injuries require different types of physiotherapy based upon the location and severity of the injury. If a child has repeatedly sprained the same ankle, therapy will necessarily focus on that ankle, as well as any body part that supports or counterbalances that ankle. The first step is to make a better arrangement of the work space. Then, exercises can correct the neck, shoulder, and wrist problems that have resulted from postural problems. Surgeries, like the Carpal tunnel surgery, are the last resort, as physiotherapy can take care of most of these postural problems before such drastic measures are needed. Another part of what is physiotherapy is rehabilitation. Patients have injuries from sports, car accidents, or assault. These injuries can be treated through physiotherapy. Given the right treatments and an injury that will respond to treatment, much progress can be made. Full functioning may be regained. New research shows that physiotherapy can promote more advanced stroke rehabilitation if it is continued progressively at home. Patients will learn to walk better. They will gain strength to do daily chores. They will also achieve better posture and more balance, which can prevent falls. Stroke rehabilitation involves a number of therapies, all designed to restore function to the patient's affected limbs.