These wheeled swivel chairs, including the Herman Miller Aeron Chair, allow multiple adjustments, such as seat and armrest height and, most important, lumbar support. Whichever you choose, for the best desk posture sit with your feet flat on the floor, arms at a 90-degree angle for typing, shoulders relaxed, and elbows near your sides and on the armrests. The center of the monitor should be at eye level.
Reclining slightly will help prevent backaches and fatigue, says Alan Hedge, Ph.D., professor of ergonomics at Cornell University. “When you lean forward, you lose a lot of the functionality of the chair,” he says. You can save by buying your chair at a good secondhand office supply store.
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