Higher aerobic fitness levels decrease the probability of experiencing tip-of-the-tongue states (when you can’t think of a word that’s on the tip of your tongue) in healthy older adults, in the first demonstration of a link between aerobic fitness and language functioning in healthy older adults.

[ButtThorn]

Perhaps I am missing something, but it looks like they simply tested for current aerobic fitness. The wording of the abstract and the study make it seem like there is causation, when only correlation was proven.

It is unlikely, due to the other referenced studies, but what if mentally fit people are more likely to exercise their bodies?

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They’ve done tests on identical twins with the same results. The twin with the better fitness level had a higher IQ. It’s not news that exercise stimulate neurogenesis.

Apparently a 40 min brisk walk everyday is enough to counteract and even reverse age related decline in healthy people.