Tangentially, the physical labor jobs I had when younger never really tired me out the way that the mental/bureaucratic/political job I have now does. Physical work actually energized me, I mean this is all confirmed today as well, we know all the benefits exercise brings on well being. There's something about desk jobs that is frankly soul sucking and literally mentally draining in a way where when the day ends, it'…
Thats too romantic - physical labour isnt funny when its repetetive and continuous, which most are. Also not using your head is frustrating / degenerative. What helps me most is keeping a balance, making mid day breaks for long runs outside or a nap does miracles. But I agree, it also needs mental relief to regenerate, but doing sports gives at least minimal breaks.
Personally my all time worst jobs was nothing to do for 3 months at a stretch while sitting on a client site so I couldn’t simply read a book.