New Worlds: Time to Exercise

Given that my job mostly involves sitting at a desk, I have to devote particular effort to getting exercise if I want to be in good health. This is not a modern phenomenon, but it is something of an elite one. If your day involves heavy physical labor in the fields or a factory, if you're a laundress or a dyer hauling around sopping masses of fabric on the regular, if you're a warehouse worker or…