"In real old age, as opposed to fantasyland, most people who live beyond their mid-eighties can expect a period of extended frailty and disability before they die." - Susan Jacoby, "Chapter 1 "Never Say Old" in book Never Say Die: The Myth and Marketing Of The New Old Age." Here you can order the book from Amazon.com.
A lot of service providers and product salespeople are making a good buck on hustling whatevers to us Baby Boomers who are convinced that our 90 will be the new 50. Joan Rivers kept their kids in private school with all her cosmetic surgery. And those who purchase houses and condos in retirement communities are ensuring that the real esate folks will have financial security in their own retirement.
However, throwing money at aging isn't going to prevent the impacts of turning 90. I know. For several years I rented an apartment in senior complex Bella Vista, New Haven, Connecticut. There seemed to be a syndrome. Once the fully independent residents entered their late 80s, they needed outside support such as aides for laundry and mobility around the complex. Soon enough, that support wasn't enough. They had to enter nursing homes. The 89-year-old woman in the next apartment died.
Based on that experience, I have no illusion that the best practices of healthy living will ensure that I have in my 90s the capabilities I had in my 50s. What has helped me not "act old," despite the onset of aging, has been being totally preoccupied with operating my communications boutique. Such extreme focus has kept it a brandname in the business.
Just as importantly, throwing myself into work versus the rites and rituals of what is supposed to "keep us young" has given me access to socializing with all generations. Here in Tucson, Arizona, in a residential complex for all ages, I am part of all the action.