Brittany
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Scientists in the U.S. say they are advocating exercise as a means of keeping young because it reduces the action of insulin in the brain and could well be the secret to longevity. The researchers created mutant mice that over-ate, got fat and even had symptoms of diabetes, and yet lived 18 percent longer than normal lab mice and the secret was they lacked a certain key gene that affects insulin, the hormone that regulates glucose. The researchers say the genetic engineering mimicked the effects of eating less and exercising and provides further proof of why exercise is good for the body.