Repetition strain injury: a review of current understanding.

"Repetition strain injury" (RSI) is a controversial condition and has become a major occupational health problem in Australia. It seems to be a disorder that is consequent to the introduction of new technology without due concern for human performance. The introduction of mechanized and partly automated processes apparently has made physical workloads lighter but has resulted in an increased regularity of physical movement with workloads that frequently are concentrated locally. Mechanization and automation have also produced an increased rate of work. A combination of several factors, each of which in itself is seemingly tolerable, may lead to this occupational hazard. Physical, psychological and ergonomic aspects may contribute to the condition but there are no useful diagnostic investigations. The pathology is unknown. Management of the condition requires carefully supervised treatment of the patient and his or her environment. The prevention of RSI necessitates improved organizational and ergonomic control in the work environment. Fundamental research into its causes, natural history and pathophysiology is essential for the development of scientifically based preventive strategies and patient therapy.