Jon Pearl rarely passes a book rack without stopping. At 73, he still takes continuing education classes.
"People think you should retire to Florida or something, but I would much rather be dead," he laughed.
Pearl's interest in reading could help him retain his memory. New research from Rush University Medical Center suggests exercising the brain may slow the rate of memory decline.
"The people that are very active actually decline 70 percent slower compared to people who are not very mentally active," said Dr. David Bennett of Rush University Medical Center.
Researchers followed about 300 elderly people, giving them tests to measure their memory and thinking. Patients were also asked about how much mental exercise they did during each stage of their life. The brain-boosting activities in the study involved looking for and processing information. Participants read books, wrote letters and visited the library.
"If you haven't done a lot before, it's not too late to start. if you're young, don't wait," Bennett said. "It goes back to the old adage 'Use it or lose it.'"
Watching TV, listening to the radio and doing crossword puzzles can also help keep your brain active.
Pearl says he's happy to hear his passion for reading could have big health benefits.
"Reading gives you more to remember, I guess. I never thought of it as boosting your memory," he said.
He's already reading up for another class he's taking in fiction later this summer.
Researchers say it's unclear whether the brain-boosting activities enhance existing memory or whether they are creating entirely new connections in the brain.
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