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The Ergon chair was introduced in 1976 after Stumpf conducted 10 years of research into how people really sit when they work. His concept books, shown here, included documentation of consultations with orthopedic surgeons and cardiovascular specialists to understand the effects of chairs and the seated posture on the body's circulatory system, muscles, and bones.  Photo 2 of 3 in Creatures of Comfort
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