The level of physical activity among preindustrial agricultural workers was immense, and they'd need 2x5 times the caloric intake of modern sedentary people to maintain weight. Did they have access to high-calorie foods? Were they generally feasting on loads of rice, bread, potatoes?

by RusticBohemian

Are there surviving accounts of how much these agricultural workers ate? What were they eating? Pounds and pounds of rice, bread, cornmeal, or potatoes? Did they have access to sources of concentrated calories like oil, nuts, lard, etc?

DuvalHeart

Here is a related answer discussing the broader peasant diets of Medieval Europe by /u/bobbleheader that might tide you over until someone comes in with a more specific answer about amounts.