Unfortunately so many think that chronic disease and reduced mobility is a fact of aging, but that is so wrong. Furthermore we're told that low-impact cardio exercise and diet are what's needed to combat the effects of aging -- WRONG.
Our bodies need impact, we were designed for handling impact, but in our modern lives we must build the body back up for dealing with impact. Especially since we naturally start losing muscle mass around the age of 30.
I've been a cyclist since the mid-80's and now I know many aging cyclists who can still ride, but off the bike they suffer from much the same aging problems as sedentary people, especially with mobility and knee/back pains.
I attribute this to lack of resistance/strength training; cardio is great, but it's only half the solution to successful aging. You can not
ignore the musculoskeletal system.
Don't use it, you lose it...