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Well, my dad spends time every   for up 30 minutes—appears to     with no signs of dementia and
               day doing brain teasers called   be neuroprotective”—meaning      assessed their loneliness, memory
               Crypto-quips—puzzles that require   it protects your brain—“and will   loss, and confusion levels every
               deciphering complex letter codes.   decrease your chances of getting   year for four years. For every one
               After he retired from work, he   other diseases too,” says Kramer.   point increase on their loneliness
               took language classes, traveled                                   measurement scale, the risk of
               abroad, played bridge, performed   But how does it work? According   developing dementia increased 51
               in an amateur theatre company,   to Kramer, exercise enhances     percent over that period. Even when
               and volunteered regularly in the   neuroplasticity—the brain’s    patients had many social contacts,
               local senior center. Despite painful   ability to grow new neural and   feeling lonely led to mental decline,
               arthritis, he still dances two times a   blood flow pathways in response   suggesting that the quality of social
               week with friends and takes regular   to stimulation and learning. The   interactions may be more important
               walks.                           greater the brain’s reserve of neural   than the quantity.
                                                pathways, the better it can respond
               If researchers are right, my father   to strokes, Alzheimer’s disease, or   “Our results are consistent with
               has (inadvertently) followed some   head traumas from falls, which all   other studies which show that
               of the best practices for battling   become more likely as you age.  negative emotions are related to
               mental decline. New studies are                                   the development of dementia and
               pointing to ways one can slow, and   Researchers need more information   cognitive decline in old age,” says
               in some cases reverse, the memory   before they will more fully   Wilson.
               loss, distractibility, and other   understand the relationship
               cognitive deficits that often come   between exercise and brain   Interestingly, when Wilson’s group
               with advancing age. Here are three   function, says Kramer. For   looked at the brain autopsies of
               of the key findings for how to keep   example, it isn’t clear yet if there   subjects who died during their
               your brain fit.                  is a ‘dose response,’ where more   study, they found that some people
                                                exercise equates to better cognitive   who hadn’t reported feeling lonely
               1. EXERCISE!                     health, or whether slacking off   still showed plaques or tangles in
                                                on an exercise program changes   their brains—the physiological
               You know how your doctor is      the equation. Still, Kramer is   hallmarks of Alzheimer’s—without
               always telling you to get a moderate   convinced that exercise is central to   actually developing the symptoms
               amount of exercise to stay healthy?   maintaining brain health.   of dementia, such as memory loss
               Well now there’s evidence that                                    and confusion. In other words,
               exercise not only helps your heart   2. BE SOCIAL                 having positive social connections
               and lungs, but it also might improve                              may have protected them from
               your brain.                      Researchers have long known that   Alzheimer’s dementia, even though
                                                having social connections helps   their brain’s physiology seemed
               In a 2008 review of more than    protect against the negative impacts   to leave them vulnerable to it.
               50 scientific studies, researchers   of aging. But not until recently have   Although researchers are still trying
               Arthur Kramer and Kirk Erickson   they been able to show a direct link   to figure out this phenomenon,
               found that regular aerobic exercise   between social activity levels and   Wilson thinks that having good
               improved brain functioning for   the brain.                       social connections over time may
               healthy people and those with                                     somehow build up overall brain
               mild cognitive impairments. In   In a 2007 study, Valerie Crooks, a   functioning, so that one part of the
               particular, those brain functions   researcher with Kaiser Permanente,   brain can take over if another part
               associated with “executive       assessed 2,200 women over a      becomes damaged.
               control”—such as multi-tasking,   four-year period, looking for
               planning, and problem solving—   signs of mental decline while    Joining a group, taking a class, or
               were most affected by exercise.   evaluating their degree of social   scheduling regular visits and phone
               Even moderate walking two-to-    connection. Her study found that   calls with friends and family can all
               three times a week over a six month   women who had a larger social   help build these social connections.
               period was enough to produce     network and daily social contact   The same goes for doing volunteer
               positive results. In one study,   had a substantially lower risk of   work, which may carry added
               brain imaging results revealed   developing dementia, even when   benefits: According to preliminary
               that patients in the early stages   she factored in age and hormone   results from a recent study by Sei
               of Alzheimer’s disease who were   use.                            Lee at the University of California,
               more aerobically fit had less brain                               San Francisco, presented this past
               atrophy than those who were less   In a similar study, Robert Wilson   May at the annual meeting of the
               fit.                             of Rush University’s Alzheimer’s   American Geriatrics Society, people
                                                Disease Center in Chicago found   who volunteered lived longer, even
               “Aerobic walking, riding a bike   that people who felt lonely were   after considering other factors,
               or using a stationary bike, or   more likely to develop dementia.   like socioeconomic status, chronic
               swimming—anything that sustains   Wilson and his group followed   health conditions, and cognititive
               your heart rate at 65 percent of   a group of 80-year-old patients   function.
               its maximum capacity or greater
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            senior’s rock magazine
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