Definition of repetitive strain injury
: any of various painful musculoskeletal disorders (such as carpal tunnel syndrome or tendinitis) caused by cumulative damage to muscles, tendons, ligaments, nerves, or joints (as of the hand or shoulder) from highly repetitive movements
— called also repetitive stress injury
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Merriam-Webster unabridged
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The first known use of repetitive strain injury was in 1983
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