Maybe invest in a gym membership with a personal trainer will be best, once covid eases in all honesty.
They will teach you how to lift with your legs, stretches and keeping you back strong.
I have a terrible back (born with a bad back), but keeping it strong and limber helps immensely.
While many folks like to think of themselves as Hercules, it can actually be dangerous when very old.
When old the bones are weaker.
I know an old guy who was in good shape, he was fixing his garage and lifted a 5 gallon pail of salt. Something cracked/snapped in his back.
Doc later said he had compression fractures of the spine. It has really crippled him and is permanent.
Figuring out a mechanical lift is probably a good idea
I've been the physical therapy route, and it really helped and I do some core exercises/stretches at least 2x a day without fail (the only exercise I stick to, because I know the consequences of not doing it). But it is no guarantee, because there is something up with my back, and it's not bad enough for me to want to pursue surgery (if I'm even a candidate, haven't gone through that level of testing). And past 65, things aren't going to get better.
As an example, and part of what got me thinking about this (the other part is we are looking to move, and I'm thinking about how to set up the brewery/winery in a new home) is the recent snow storm. We have a plow service for our large driveway, but I shovel the walk, and do a bit of clean up from driveway to walk. I was *very* careful, lifting with my legs, never arching my back, and I was fine. It was pretty deep and pretty heavy snow. I just took my time, was careful, and all was good. Two days later, a little more snow, and some drifting, so I go out and clean up again. And again, I'm careful, no problem. Then, just as I'm finishing, I look and think
"I should scrape that little patch so no one slips on it", and since this involved no lifting, I just pushed the shovel toward that patch to scrape it, didn't really think about my form since it seemed like such a nothing move, and WHAM! - a surge of pain strikes my lower back, I drop the shovel, curse, and manage to get back in the house and crawl on the floor so I can try to stretch it out. I got it iced, and I'm recovering pretty quickly this time, but it hurts to even look at a 50 pound weight right now, and probably for a few more weeks. Fortunately, my son and son-in-law will be here Saturday, so I have a list of things for them to do, if DW can't handle it.
So yes, I want/need some mechanical help. Hiring someone makes sense, but sometimes you just want to do it on your own schedule and not feel so dependent on others.
Similar to
Sunset's story, my Aunt(RIP) just lifted the bed a bit to shift it to vacuum under it, and crushed her spine and was in immense pain for years, until a friend found a surgeon who was able to help her. A friend of mine has a series of back problems, and doctors have said the surgery might help, but has a pretty significant chance of leaving him worse off. So I'd rather avoid these issues if I can, to the degree I can ( no guarantees in life).
-ERD50