The original Q was about work, work and longevity do not have a direct linkage, this discussion seems to have drifted into longevity, OK there is easier evidence there. Hunter gatherers were more vulnerable to individual "events", though less to infectious disease. Farmers have more levels of...
Go look at human remains, cross check joint wear with diet from collagen analysis, Q.E.D.
I'm sure if you google about the data is all there. I live in a remote peasant village, their joints give out well before the rest of them, this does not seem so true of paleolithic peoples. I expect there...