WORKSTATION MYTHS

Many generally accepted guidelines for good posture and proper furniture at computer workstations are, in reality, myths. If rigidly followed, these misconceptions can lead to uncomfortable and costly mistakes. Some of these myths include:

• Correct posture at the computer eliminates discomfort and possible injury. "Picture-perfect" posture can be extremely fatiguing. If you commute to work and sit most of the day, you can be sitting for 10 to 12 hours a day. When sitting, the full force of gravity is carried by the upper body and can lead to excessive fatigue resulting in muscle strain and joint pain. This strain is increased when you sit upright and do not use the back of your chair for support.

• Computer operators should sit upright at the computer. If given a choice, four out of five computer operators prefer a slightly reclined position when working, because it reduces the amount of muscle activity required to maintained an erect posture.

• Height adjustable chairs enable you to work at any height table. In many situations, chair height adjustments won't result in safe work postures at a desk or table. If the table top is low, lowering the chair may reduce knee clearance and leg space. This can result in an awkward position that places extra pressure on your back. A better alternative would be to raise the desk on blocks. Petite workers often have difficulty working at a standard or high desk-top. If the chair is elevated to work comfortably, feet end up dangling above the floor. Footrests can sometimes provide foot support in this situation but they still do not accommodate all positions a worker might need to reach equipment or complete all work tasks. The best solution is to lower the desk or change the work task to eliminate the need for forward reaching.

• Ergonomic chairs are designed to fit all users. Everyone is shaped differently. Women generally have larger hips than men and need a chair with a higher lumbar back support and a wider seat area. Men frequently have longer legs and need a deeper seat area. When selecting a chair, consider your individual needs.

• Adjustable work stations are the best office furniture. Most work stations require adjusting work surfaces manually which is often inconvenient and time-consuming. A better solution is to place key boards and monitors on flexible, counter-balanced arms that can be easily adjusted to accommodate a variety of workers and work postures.

Don't be maimed by workstation myths. Find your most comfortable position. Make sure your furniture and chair are adequate for your needs and use good work habits. Change postures and take frequent short breaks throughout the day. Good common sense can go a long way in making your work environment safe.

Adapted from Eileen Vollowitz PT, Health by Design, Novato, California