A good brain workout appears to require different levels of intellectual stimulation, such as thinking out problems in your mind and then manipulating objects to create the solution, Petersen said.
“Think of operating a computer, especially for an older person,” he said. “It can be challenging. Things always go wrong, and you have to problem-solve to figure out why something didn’t work like it should have.”
Crossword and sudoku puzzles probably are good brain exercises as well, Petersen said, although he said this research shouldn’t be read as a direct endorsement of online brain training programs such as Lumosity or BrainHQ.
“I’m not saying that your brain game isn’t good for people, but I’m not endorsing it at all,” Petersen said of such online programs. “We can’t say your exercises are the same thing as what we found in this, but it’s not an unreasonable connection.”
Dr. Paul Wright is chair of neurology for North Shore University Hospital in Manhasset, N.Y., and Long Island Jewish Medical Center in New Hyde Park, N.Y. He said the new study provides geriatric doctors with more evidence to convince patients that brain workouts are important for healthy aging.
“This way we can actually tell our patients with mild cognitive impairment that there is evidence now that if you stay mentally active, you will actually do much better than if you don’t,” Wright said.
These exercises also need to involve “not just looking at something, but the interaction with your vision and your hands and movement,” he added.
On a final note, Petersen warned that people shouldn’t turn these activities into daily drudge work.
“You don’t want to do 10 crossword puzzles a day like going to the gym and walking around the track for an hour,” he said. “As you age, try not to withdraw, try not to slow down intellectually. Stay engaged out there. Do things you enjoy, and it will be fun. If you enjoy doing something, do it, and do it avidly because it might in fact be beneficial to you.”
The study was published Jan. 30 in the Journal of the American Medical Association.