How long can you sit at your computer without hurting? Thirty minutes? Sixty minutes? Sitting for prolonged periods with poor body positioning can be very fatiguing. Over time, the fatigued area becomes strained and pain sets in.
With a correctly configured workstation you should be able to sit for hours without hurting your back, neck, arms, or wrists. Below are the recommendations I give my patients to help them achieve correct ergonomics or body positioning.
Choosing a well-designed office chair is an essential step in achieving good computer ergonomics. A good chair will preserve and support the natural curves of your back. In the neck and low back the spine curves in, and in the middle back the spine curves out. To perform well the contour of the chair’s back should match the curves of your back. (See the “Good vs. bad computer posture” drawing by clicking on the link in the resource box.) This support keeps you from slouching when you sit.
A taller seat back is better than a shorter one. The lower portion of the seat back should support your lower back’s inward curve, and the upper portion should support your middle back’s outward curve.
Sit all the way back in your chair so the seat back can do its job of supporting the curves of your spine.
A good chair must be well padded. I’ve seen trendy “mesh” chairs in office-supply stores but have never found one that was satisfactory. Mesh chairs are too stiff and hard. Nothing beats old-fashioned foam padding in a chair. The seat cushion should fit your body and be well padded.
Your legs should be parallel to the ground; and those with short legs may need a footstool. A chair that reclines offers a good change of position that can help prevent fatigue. Reclining allows you to change positions and still receive the support of a well-contoured seat back.
Once you have a properly supporting chair, you can turn your attention to the desktop.
One of the most common computer workstation errors is poor monitor placement. A correctly positioned monitor will help you to avoid neck and shoulder pain. The ergonomic principle here is to keep your head and neck in a neutral position: This is accomplished by looking straight ahead. You don’t want to look up and down, and you don’t want to look left and right.
You keep your head from looking up and down by keeping your head and eyes level. This is accomplished by raising the computer monitor so that your eyes hit the screen three quarters of the way up (See the graphic in the resource box.) A level head keeps your neck muscles from having to constantly contract to hold your head in a poor position.
You keep your head from looking left and right by placing the monitor directly in back of the keyboard. This avoids the common practice of placing the monitor off to the side. This side positioning causes your neck to …