Chapman, Benjamin P, et al: Personality and longevity: knowns, unknowns, and implications for public health and personalized medicine. Journal of Aging Research; 2011: 1-24.

It is not the intention of Liberty Mutual Insurance to provide specific medical advice, but rather to provide information for people to better understand their health. You should consult with your doctor about specific medical questions and before starting an exercise program, especially if you have not exercised in a while.