> called to a halt for breakfast, lunch, the customary afternoon nap, and dinner. Depending on time and place, there were also midmorning and midafternoon refreshment breaks.

They didn't exactly have a choice with the food. It's needed if you genuinely spend a hard day working. People used to make drinks for laborers containing things like molasses here in the US.

I admit we've lost the afternoon nap, but I'm not sure why. It does happen elsewhere. The China office at previous job worked long hours and all napped at their desks in the afternoon.