Ergonomics

Some ways you know you are suffering from this is headaches, aches in bones, numbing, tingly feeling. You can prevent this by being in have good habits in your work inviroment. A good habit is having good posture. It is good to have a chair that can be raised or lowered. Your eyes should be level with the top of your computer. You also want your arms to be a 90 degree angle.

picture from Ergonomic Pictures & Posture Photo