I never realized how much cooking relies on endurance until I took two weeks off to stay in a hospital and lived on mediocre eggplant parm sandwiches (the only vegetarian option my relatives could think of). When I returned to the kitchen, my wrist strength was gone.
Seriously — you don’t notice how much muscle tone you build in your forearms, wrists, and fingers from chopping several times a day until it disappears and you’re left with a half-cut kabocha squash and aching palms.