After they had dined, Mrs. Teachum told them she thought it proper that they should use some exercise in the cooler part of the day, lest, by sitting too much, they should injure their health. – Sarah Fielding (1710–1768), “The Governess, or The Little Female Academy,”

How vain it is to sit down to write when you have not stood up to live! – Henry David Thoreau, journal, 1851 August 19th

Workers at home who have aching backs and but one writing desk, and that a low one, will find great relief from writing in a standing position (if a recess is out the question), if only for fifteen minutes. My standing desk is a broad mantel shelf. – B.G.A., “Helpful Hints and Suggestions,” in The Writer, August 1887

Throughout the illness the most obviously exciting cause of the attacks was posture, stopping over a writing-desk; and he ultimately had to do such work either kneeling or at a standing desk. – Lawson Tait, 1882