Repetitive Stress Injury
What Are Repetitive Stress Injuries? (
Repetitive stress injuries (RSI) are a group of conditions generally caused by placing too much stress on a joint, and they vary in type and severity. Most repetitive stress injuries are linked to the stress of repetitive motions at the computer or overuse injuries in sports. (source:

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Why does repeated stress cause injury?

When sress is placed on a joint in a repetitive action, (e.g., typing or using the mouse), the joint area does not have time to recover and it becomes irritated. This can cause the area to become painful and swollen.


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Why is RSI a new phenomenon?

While keyboards have been around for many years, the computer has made it possible to perform a wider range of tasks without ever leaving the keyboard. In the past, individuals who used typewriters typically also had to go to the filing cabinet, go to the copier, open envelops to read mail, move their entire arm to manipulate the carrige return. These additional tasks created breaks in the workday as well as exercises for different muscle groups. Computers have made it possible to perform all of these tasks without the hands from ever leaving the keyboard.
Repetitive Stress Injury (
From The Arthritis Society

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Paul Marxhausen (
As more and more work, education and recreation involves computers, everyone needs to be aware of the hazard of Repetitive Strain Injury to the hands and arms resulting from the use of computer keyboards and mice. This can be a serious and very painful condition that is far easier to prevent than to cure once contracted, and can occur even in young physically fit individuals. (source: Paul Marxhausen; UNIVERSITY OF NEBRASKA-LINCOLN)

Typing Injury FAQ (
Provides a wide variety of information about repetitive strain injuries (RSI's), resources for dealing with these ailments, and a broad description of assistive products to reduce injury risk and symptoms. While the primarily focus is on computer users at risk of injury, health professionals, researchers, educators, designers, resellers and manufacturers will find a wealth of information of interest. Many of the resources provided here also relate well to other work environments.

Workplace Injuries & Physical Disabilities (

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Amara's RSI Page (
An RSI develops slowly and can affect many parts of the body. Many symptoms may come and go before settling in: aching, tenderness, swelling, pain, cracking, tingling, numbness, loss of strength, loss of joint movement, and diminishing coordination of the injured area.

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