Shoulder injuries involving overuse often include tendonitis, bursitis, frozen shoulder and degenerative or post traumatic arthritis. Many of these injuries are caused by workers having to complete repetitive overhead tasks where tools, equipment, materials or stock have to be lifted, held, positioned, maneuvered or moved in or into overhead positions. These actions place great strain on the shoulder and when they are carried out repetitively the likelihood of an overuse type shoulder injury increase dramatically. This type of injury occurs in many Western Australian workplaces and commonly result in workplace compensation claims. Scaffolders, plasterers, painters, builders, carpenters, electricians, brick layers, boiler makers, trades assistants, chefs and cooks, retail workers and mechanics frequently suffer shoulder overuse injuries due to having to repetitively complete tasks overhead.