I had some of my dad's old 8mm film put on compact discs a few years ago. He and my grandfather had a lumber yard and building material business. They unloaded rail cars of materials by hand as they located right across the street for the railroad. They had a little sidetrack where the dropped rail cars off for them. Some of the film showed their crews constructing their concrete block buildings. Nobody looked like they weighed over 150 pounds.What’s crazy is them doing it with not fat on them , my grandfather looked like he wasn’t much wider than his M1 . I think about that some times when I complain about it being cold outside . I can’t even begin to imagine what it took for them to make it through those times .