"I think that I cannot preserve my health and spirits, unless I
spend four hours a day at least--and it is commonly more than
that--sauntering through the woods and over the hills and fields,
absolutely free from all worldly engagements. You may safely say, A penny for your thoughts, or a thousand pounds. When sometimes I am reminded that the mechanics and shopkeepers stay in their shops not only all the forenoon, but all the afternoon too, sitting with crossed legs, so many of them--as if the legs were
made to sit upon, and not to stand or walk upon--I think that they deserve some credit for not having all committed suicide long ago."
Henry David Thoreau (1862): Walking
(versão brasileira: Andar a Pé)