That's now hot manual labor works. This is the bubble described by the parent comment. You'd be very surprised by how many continuous hours people work globally.
I have done construction work. There is a lot of standing around especially with manual labor positions. Even when there are hours of pure manual labor to do that’s relative. Nobody can work full out for 8hours so you either pace yourself or swap out and take breaks.
At the extreme edge you get long haul truckers who continuously work for as long as physically possible. But, on a second by second basis it’s not particularly demanding.
