I believe most distempers proceed from too much sitting still. РMarie de Rabutin-Chantal, letter to her daughter Fran̤oise-Marguerite de S̩vig

Desidiousness. Lat. sitting too much; slothfulness, idleness, carelessness. – A New Dictionary of the English Language by Charles Richardson, 1836

Still, it is customary to keep pupils sitting too long at once. They ought to stand occasionally, or march around the room; and they should be required to exercise a few minutes in the open air, once an hour, at least. – American Annals of Education and Instruction, April 1832

Reginald was nearly all day at his office, and half the night at his stand-up desk in his room. – Henry Kingsley, “Reginald Hetherege,” 1874