CVD includes diseases that affect the heart and blood vessels. Arterial stiffness, in which arteries harden and become less flexible, increases the risk of developing CVD. Arterial stiffness increases both with age and in certain disease states, including high blood pressure, diabetes, and obesity. Young adults who are obese prematurely place themselves at risk for developing arterial stiffness and CVD. Physical activity and weight loss may reverse arterial stiffness in these individuals. Reducing sodium intake, which has been proven to decrease blood pressure, may also improve blood vessel function and arterial stiffness. The purpose of this study is to evaluate the effectiveness of a low sodium diet and a behavioral weight loss intervention in reducing arterial stiffness in young, moderately overweight individuals.