Repetitive Strain Injury (RSI) is a potentially disabling illness caused by prolonged repetitive hand movements, such as those involved in computer use. Symptoms include intermittent shooting pains in the hands, wrists, forearms, and back.
Here are ten simple tips which may help you prevent computer-related RSI.
When you type, your wrists should be in a neutral position. That means like this:
Don't bend your wrist towards your little finger:
And don't bend your wrist towards your thumb:
Also be careful not to type with your wrist bent upwards towards you:
This is known as dorsiflexion. It's particularly easy to do this if your keyboard is badly adjusted, or is at the wrong height.
Typing with your wrists in any position other than the neutral position puts additional strain on the tendons and sheaths, and increases your risk of repetitive strain injury.
Many people believe that, because cheap keyboards have a height adjustment at the rear of the keyboard, the back of the keyboard should be raised when typing.
This is not true.
The correct keyboard adjustment is one where the keyboard is flat and at or below elbow level. This position makes it easiest to type with your wrists in the neutral position. If you can't have the keyboard at the correct height, you should choose the adjustment which keeps your wrists as near to the neutral position as possible.
Watch out for what you do when you are not typing! It's all too easy to rest your wrists on the hard edge of the desk or table. A gel wrist rest placed along the edge of the desk may help you to you to stop doing this, as well as encourage you to avoid dorsiflexion.
More modern "ergonomic" keyboards, such as the Microsoft Natural Keyboard make it easier to type with your wrists in a neutral position. As well as splitting the keyboard in the middle to reduce ulnar and radial deviation, they allow the front of the keyboard to be raised to avoid dorsiflexion. In addition an integral wrist rest prevents you from resting your wrists on the hard edge of the desk when you aren't typing.
But watch out! Tempting as a wrist rest is, never rest your wrists on the wrist rest while typing. The wrist rest is for use when you aren't typing, not when you are.
Many people develop RSI in their mouse hand. Bending the wrist (dorsiflexion) is often to blame. A gel wrist pad (such as those made by Fellowes, Belkin, Kensington, or another reputable manufacturer may help you to keep your wrist in a better position while using the mouse. You should try to keep your wrist in a neutral position, just as when using the keyboard.
You may be able to cut down on your mouse usage by using keyboard shortcuts instead.
Microsoft has a comprehensive list of Windows Shortcuts which enable you to do pretty well anything you normally do with a mouse with a few keystrokes. It's well worth reading through the entire list once, and making a note of the most useful ones.
If you switch mouse hands, it can help. It took me about a week to become ambidextrous as far as the mouse was concerned.
However, watch out! If you haven't identified yet what the cause of the problem is, you will probably just get RSI in the other hand and have two sore wrists instead of one!
One of the most frequent pieces of advice you will hear if you have RSI is to take regular breaks. It's also one of the most difficult pieces of advice to follow.
It has been suggested that, for RSI prevention purposes, you should take a five minute break after every 20 or 30 minutes of continuous activity. If you are suffering from RSI you should clearly take more frequent and longer breaks.
It's difficult to remember to take a break while you are working. By definition, you are doing something else at the time. A good break reminder for your PC, such as our Albion StopNow, can make it far easier to take regular breaks.
When you take a break, don't just sit at your desk. Get up and walk around. Get a glass of water. (Sneaky tip: if you carry a bunch of papers and walk around an office looking purposeful, everybody will think you are exceedingly busy and not just getting a little exercise while taking a break).
Don't slouch. Your mother probably told you this. It was good advice, and she probably didn't know how many hours you would be spending in front of a keyboard.
Bad posture is a primary risk factor in RSI. Choose and adjust your seat so that you sit up straight, rather than leaning forward over the keyboard.
Adjust your display so that the monitor is directly in front of you, with the top of the screen at eye level except if you wear bifocal glasses. If you wear bifocals, you may need the screen slightly lower down so that you can focus on the screen through the correct part of your glasses without straining your neck.
Holidays are a great idea. They give your body time to recover from the rigors of the workday. But watch out when you return!
Think of yourself as being like a marathon runner. You've trained yourself over a number of years to execute thousands of precise movements with your fingers for a number of hours each day.
Then you take some time off.
If a marathon runner spent a month or two without running would he or she expect to be able to run a full marathon the next day? Don't expect too much of yourself when you return to work after an extended break. Take a little time to get back into the routine and work yourself up to your previous peak performance. Otherwise you, like the marathon runner, will risk injury.
I know, you've heard that advice before. But it is still good advice.
Not only is lack of cardiovascular exercise (that's exercise for your heart like walking, running and swimming) going to make you die sooner, it's also going to make you more likely to have RSI (and a host of other problems). So you'll end up with not just a short life, but a miserable one.
Obesity is another risk factor. If you're overweight, your muscles are having to support that extra weight. If you are very overweight, you may also find it difficult to find a typing position which avoids ulnar deviation.
Your chair is important. You spend a lot of time sitting on it, and if it doesn't give you the support you need or causes you to sit in an awkward posture, it can cause you a lot of problems.
Your ideal chair is made of breathable fabric (prevents sliding) and has a five-point base. It is fully adjustable. You can adjust the height, tilt, backrest and armrest heights.
But one you have your chair, how should you adjust it?
If you're lucky, your employer might buy you an expensive chair. Failed startup companies can be a good source of high-end ergonomic chairs. Really you have to sit on a chair to figure out if it works for you. (Personally I found the Staples Hyken Mesh Task Chair a reasonably priced choice.)
Don't rely only on the Internet for all your medical advice. It may be out of date, or just plain wrong. A physician's physical examination may notice factors that you weren't looking for or aware of.
Also remember the story in Jerome K. Jerome's classic comic story Three Men in A Boat where the narrator reads a medical dictionary and concludes that he has every disease in it except Housemaid's Knee. A doctor may be able to point out alternative causes of your symptoms and calm your fears.
Sometimes RSI symptoms may go away if you do nothing.
But they can also get considerably worse. Don't take that risk.
Some of us found the hard way that just hoping the pain will go away is not a good option.
Don't wait until:
Change your work environment. Change your work habits. Start taking regular rest breaks.
Do something and do it now!
Taking regular breaks is one of the most important changes you can make.
If you've tried to take breaks, you'll know that it's not that easy to do. Take a free trial of our break reminder program on your PC and find out how much difference a week of taking regular breaks can make.
There are many books which can help you understand RSI. See our RSI Resources Page for some of the books and other resources we found useful.
We also have a short glossary of RSI Terms.
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