M usculoskeletal disorders are a leading cause of disability among workers in the United States, affecting nearly one half of the nation's work force (U.S. Department of Health and Human Services, 1986). In 1988, work related injuries, including soft tissue and musculoskeletal injuries, occurred at a rate of 8.3 per 100 workers (U.S. Department of Labor, 1990). Gender data are limited. However, the rate of fractures, dislocations, and sprains severe enough to require medical attention or activity restriction per 100 persons 18 to 44 years old was 12.6 for males and 7.5 for females during 1990 (U.S.