The terminology of repetitive motion injuries has changed over the last several years. The term now used by the United States Department of Labor and the National Institute of Occupational Safety and Health (NIOSH) to describe adverse health effects of repetitive motion to the musculoskeletal system is musculoskeletal disorders (MSDs). When these injuries or disorders are considered to be work related, they are identified as work-related musculoskeletal disorders (WMSDs). Other common names used interchangeably over the years have included repetitive stress injuries (RSIs), repetitive stress disorders, cumulative trauma disorders (CTDs), and overuse syndrome. Musculoskeletal disorders refer to conditions that involve nerves, tendons, muscles, and supporting structures of the body. They do not include injuries resulting from slips, trips, falls, motor vehicle crashes, or similar causes.
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