Regular exercise prevents telomeres from shortening. In tests with twins, the difference in their telomeres was a much length as would equal nine years. The non-exercising twins died younger and probably looked older and more worn out.
Catherine Fuchs' Wholebody Wellness
Catherine Fuchs' blog to the good life for body, mind and, spirit.
Exercise and Your Telomeres
Catherine Fuchs' Wholebody Wellness 
First, it’s unusual to find another article regarding telomeres. Not many people even know what that is, so I say good for you.
Posted by scottandjoanbailey | June 6, 2012, 6:19 am