Finding the Just-Right Chair Goldilocks would have made a great ergonomist. She noticed the difference between the mama-, papa- and baby-sized chairs right away, insisting on the one that was just right. Nowadays she would have the added headache of persuading people that seating should be comfortable, not chic. Adjustable, good-for-you chairs are frequently described as funny-looking, but if seating had been designed to fit the human anatomy from the start, it's the standard office chair that would get the laughs. Like many other manifestations of "progress," most chairs neglect to take our shape into account. That said, consider the new Girsberger Xerra chair. Sitting in the chair for the first time evoked a wonderful "ahhhh" sensation. The seat is neither too hard nor too soft, and it subtly contours the thigh. The backrest meets the lower spine just where it should. The dense-foam armrests, which are shaped to cradle the forearm, gently give way in a slight up-and-down movement. So far, it might be a wonderful chair for an executive who spends the day dictating letters and cutting deals on the phone. But what about computer users? As configured, the Xerra misses the mark in a couple of areas. First there's no pelvic tilt. The armrests slip sideways to support the forearms while typing-a big no. Another feature, the floating backrest, is both an asset and liability. Happily, all can be overcome.
![]() Girsberger's Xerra chair has a lot of great options--and a few you won't want. PELVIC TILT = LESS BACK STRAIN When a chair seat is flat, it reduces the natural curve in the lower spine, compressing the vertebrae and causing lower back strain. If a chair seat tilts down, the spine stays curved, reducing strain. A chair's pelvic tilt feature feels odd at first, like you're going to slide off the chair. But once you get used to it, it's much more comfortable than a flat seat. Fortunately, the Xerra can be ordered with an adjustable seat. THE ARMREST: STEADY AS YOU GO Armrests present a built-in dilemma. They're great when you want to rest your shoulders, but an injury risk if you use them to support your forearms while you compute. And if armrests are too long, they prevent you from sitting close enough to the keyboard. This design forces you to extend your arm, an exhausting position to hold for long periods. The Xerra's optional adjustable armrests are the right length, but they slide sideways about 30 degrees in either direction. This happens when you least need it-when you bump it with your elbow. To avoid mishaps, order the standard armrest. THE INTELLIGENT BACKREST The Xerra backrest can be locked in place or it can move with you. Rather than collapsing under your weight, it requires a slight effort to recline. Then it tracks your spine as you lean forward again. While this "synchronic mechanism" encourages movement, you must learn how to use it properly, because you shouldn't compute from a backward-leaning position. The Xerra's lumbar support can be adjusted by moving the backrest up or down. THE WELL-ADJUSTED CHAIR Adjustability is double-edged sword. While you want a chair to fit your body, don't buy adjustability for its own sake. Just because the body is capable of making a motion doesn't mean it is an optimal working position. Sometimes less is better. Don't choose a chair with synchronic movement unless you can train your staff in its proper use. Instead, consider chairs with single adjustments, such as the Girsberger Pronto. CHOOSING CHAIRS: THE SHORT COURSE Along with features such as pelvic tilt, adjustable height, lumbar support, and short armrests, check the following when buying a chair.
Xerra
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