Musculoskeletal disorders of any cause are among the most prevalent medical problems, affecting 7% of the population and accounting for 14% of physician visits and 19% of hospital stays. When looking specifically at work-related musculoskeletal disorders, the Bureau of Labor Statistics (BLS)
reported that in 2000 a majority of all illness cases were due to disorders associated with repeated trauma. This figure does not include back injuries. BLS also reports that the number of cases of repeated trauma has increased significantly. When looking specifically at cases involving days away from work, for which more detailed information is available, BLS reported that many cases were the result of overexertion or repetitive motion. This figure includes back injuries.