Can an analogy be made between the pursuit of mental fitness and of physical fitness during aging? I certainly do not know, so I will remain skeptical.
The idea that pursuing mental fitness could prevent Alzheimer's is ridiculous. However, it appears to me that many retired people take on difficult mental challenges for an hour or two daily to try to keep their brains geared up. I am not talking about passive learning (ie reading), but active studying. A few examples from people I know:
- A retired guy who decided to refresh his college calculus, and has since taken his math studies three levels beyond where he had gone before, and is still going
- A retired gal who has become fluent in Italian, and can now read Dante and hang out in Italy, considering buying a summer place in Ferrara.
- A retired lawyer who has become fluent in Mandarin
- A friend who decided to become fluent and literate in a new language every two years, and has thus far done that three times using Rosetta Stone.
- A friend who at age 50 has taken up piano in a serious way
- A retired executive neighbor who thought he was too smart to take up mechanics in high school who took up small engine mechanics and is moving on to (pre-computerized) auto mechanics. Now a grease monkey and very happy.
- A retired physician who decided to become an expert in immunology and the genetics of immunology, and has been doing so, while having to learn biomedical statistics on the side.
- A friend who has just gone back to college. Graduated decades ago, but feels she missed a lot.
Mental exertions/disciplines like these are analogous to physical training. I'm sure it's not wasted effort because difficult achievement is its own reward. One thing we know is that strenuous physical exertion (ie not walking or relaxed swimming) is good for brain maintenance but not the opposite.
An article: This Is The Only Type Of Brain Training That Works, According To Science. Most “brain training” programs are little more than memory games.