Getting bread was not fun.
“Being thus sent in pistrinum was essentially a deferred death sentence, much like being sent to work in mining. Consequently, in large, muscle-powered mills, the fellows actually turning the millstone were likely to be captives, criminals or enslaved persons (often being punished for some transgression), or else very desperately poor; in any of these cases they probably had sadly short lives.”
https://acoup.blog/2020/08/06/collections-bread-how-did-they-make-it-part-iii-actually-farming/