On topic when looking at working on the heavy parts. What to do when you can't handle the weight?

Loaded up my auction treasures yesterday and part of the load out was moving 45 suitcase weights at 102 pounds each from pallets to metal baskets for transport safety. Moved 30 in 20 minutes before yard hand took pity on me and helped with last 15. Left knee shot(and swollen today) arthritic shoulders hurting,fused/repaired lower spine talking to me and my right bicep with is now a monocep since I tore some ligaments a few years ago is pretty sore too.Good cardio workout though as my heart felt like it was doing a solid 160 BPM and ready to jump out and take off across the yard.
Only 56 but started working for wages at 11 so after 45 years of hard work body is just wearing out:much like the old equipment I love to fix.
About 10 years ago a doc gave me the "long face" talk and explained that with what I do any repairs wouldn't last and they are a 1 time deal: wear out a new knee and she's done. same on shoulders etc.
KInda wish my broken down body was more like my equipment: just put on new or rebuilt parts and keep on pushin or diggin.
Back a very few years ago I was a bull and worked like one.Did too much I guess and paying for it now.Hate to ask anyone for help but I guess I will start out of necessity. Down right frustrating.
One good thing though: on the really heavy stuff I have become a rigger extraordinaire : had to as there is no choice now
Amos
Pushin hard or diggin deep life is good.
What's ahead is what matters. What's behind is already done.
A fool of a man is he who doesn't ask questions...
God gave us 2 ears and 1 mouth for a reason...