Carrying things on your head/shoulders is surprisingly efficient. Many people can unrack a barbell with double their body weight and just stand there for a bit without having done any strength training at all. The trouble is getting the load into that convenient orientation. Taking something from the ground and putting it over your own head is where all the bad stuff happens. Once it's up there it's not as big a deal.

You can make yourself bulletproof to most forms of hard physical labor by practicing the clean & jerk. This movement is entirely about "get heavy thing off ground and above head" as efficiently and safely as possible. There are advanced movements that can be even more efficient but you trade some injury risk for screwing up. That is to say, the actual amount of wear on your body is even lower if you really know what you're doing.