Reading the Arts & Letters Daily today, I came across this nugget in an article ("Keeping Your Brain Fit") by Christine Larson, published in U.S. News & World Report, posted back in January --
A 2003 study reported in the New England Journal of Medicine, for example, found that people over 75 who danced, read, or played board games or musical instruments also had a lower rate of dementia.
. . . the Alzheimer's Association recommends any activity that will keep you curious and learning: reading and writing, attending lectures, taking classes, even gardening.
See!!!??? It's perfectly OK for me to spend my days lost in the pages of a book (even though I still have a few years to go before I reach 75). After all, I'm doing it for my health! But maybe I should get up and shake my booty now and then, too.