Employee Repetitive Motion or Strain Injury. Workers subject to repetitive activity, exertions, vibration, and awkward position suffer RSI, or repetitive use injury, overuse, or stress injury. Common arm injuries include rotator cuff injury, carpal and cubital tunnel, tendinitis, and nerve disorders. RSI affects the muscles, ligaments, tendons, nerves, joints and neck and low back vertebra. The Law Office of James M. Hoffmann, attorneys handling Workers Compensation.