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In many ways, our memories shape who we are. They make up our internal biographies—the stories we tell ourselves about what we've done with our lives. They tell us who we're connected to, who we've touched during our lives, and who has touched us. In short, our memories are crucial to the essence of who we are as human beings.
That means age-related memory loss can represent a loss of self. It also affects the practical side of life, like getting around the neighborhood or remembering how to contact a loved one. It's not surprising, then, that concerns about declining thinking and memory skills rank among the top fears people have as they age.
What causes some people to lose their memory while others stay sharp as a tack? Genes play a role, but so do choices. Proven ways to protect memory include following a healthy diet, exercising regularly, not smoking, and keeping blood pressure, cholesterol, and blood sugar in check. Living a mentally active life is important, too. Just as muscles grow stronger with use, mental exercise helps keep mental skills and memory in tone.
Are certain kinds of "brain work" more effective than others? Any brain exercise is better than being a mental couch potato. But the activities with the most impact are those that require you to work beyond what is easy and comfortable. Playing endless rounds of solitaire and watching the latest documentary marathon on the History Channel may not be enough. Learning a new language, volunteering, and other activities that strain your brain are better bets.