Repetitive Strain Injury is also known as cumulative trauma disorder (CTD), which is just one of many different names associated with Repetitive Strain Injury. The effect of Repetitive Strain Injury comes as the result of overusing a tool such as a computer, guitar or knife; basically any activity that requires repeated movements. Repetitive Strain Injury affects your muscles, tendons and nerves in your hands, arms and upper back.

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