The most recent incarnation of gainful employment is almost like spending ten hours playing a game of solitaire. I would like to try to think of it as a game of chess. But chess, at least amongst us Human Beings, produces a sporting response that is occasionally predicated by a move one or other of us might make. In solitaire there is so much less ducking and weaving.
As well solitaire is generally played while seated, so probably better to think of this recent incarnation, as solitaire with an athletic component. There is a great deal of moving around while pushing a cart, and reaching for things, and sometimes there is climbing stairs. And often a terribly loud and rather judgmental noise from the hand held device produces absolute confusion in a novitiate.