My aunt - a professor of musculoskeletal anatomy here in Australia - has developed a programme called Onero[1] specifically to deal with this question. I've done a bit of general IT work to help her recover from her tech partner going AWOL (classic startup story) and have watched people participate in it. It was weird at first to see old people - 80+ - in a gym, pumping iron. But they really got into it and from what I can glean from talking to my aunt the difference is pretty amazing.

The programme is starting to be picked up by practitioners globally - though it's more common here in Australia for the moment. There are online versions of the courses as well.

1. https://theboneclinic.com.au/onero/