By now you'd think there wouldn't be a lot to add to the list of good things that can come from exercise. Anything that burns calories, builds muscle, improves mood and lowers your risk of heart disease, stroke and diabetes is pretty much doing its share already. But here's a surprising new plus: physical activity can change your DNA--for the better.
DNA is nothing less than the stuff that makes you you: the unique molecular code that dictates whether you have brown hair or blue eyes or a propensity for cancer. You are born with that DNA, and it doesn't change....
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