Excercise makes you keep fit, lose weight, promotes happiness. Also recent study shows that it also improves memory preventing Dimentia in old age

What more persuasion do you need to get off the couch and start running or whatever form of excercise you like to engage in?
In a study published in Oct 31, 2010 issue of Neurology, , the medical journal of the American Academy of Neurology by author Kirk I. Erickson, PhD, with the University of Pittsburgh in Pittsburgh, it was observed that at least walking six miles per week may protect brain size and in turn, preserve memory in old age.

The study found that people who walked at least 72 blocks per week, or roughly six to nine miles, had greater gray matter volume than people who didn’t walk as much, when measured at the nine-year time point after their recorded activity. Walking more than 72 blocks did not appear to increase gray matter volume any further.

By four years later, 116 of the participants, or 40 percent, had developed cognitive impairment or dementia. The researchers found that those who walked the most cut their risk of developing memory problems in half.

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