RSI sufferers may have a lower threshold for vibration along the median nerve so are more sensitive to repeated movements such as using a keyboard, playing a musical instrument or operating a checkout till. RSI pain is more diffuse than carpal tunnel syndrome and injections won't help. Most people improve once they stop the repetitive task. How injuries occur To function properly, the body needs a steady supply of blood. Cutting off or slowing the blood supply harms the tissues of the body.
Tense muscles squeeze off their own flow of energy and fuel.
Muscles can get energy without oxygen, but not without pain. The process produces lactic acid, a potent pain-causing chemical. Nerves deprived of blood and squeezed by muscles begin to tingle or go numb. The rise in computer use has caused the number of RSI cases to skyrocket in recent years. A number of books have been written on the subject and many people have started Internet campaigns to make workers more aware of the dangers.