Currently, 1 in every 3 American adults is considered clinically obese, placing a burden on the US economy in excess of $215 billion. Among the causes of this condition is the fast-paced lifestyle led by many Americans, compounded by lack of time to exercise. The Elasto-Trak combines the cardiovascular workout of a treadmill with the resistance training of springs, thereby enabling users to achieve the benefits of both exercises simultaneously. Testing of this device will entail testing the strength of the device's frame, testing that the device successfully raises the user's heart rate into the cardiovascular training range, and ease of use. The resultant forces on the frame were calculated assuming a maximum load of 300 pounds. Based upon these calculations, the Elasto-Trak will be able to support users up to 300 pounds without causing any detectable deflection of the frame. This fusion of cardiovascular exercise with strength training through a user-friendly medium will provide the basis for user compliance and convenience, thus promoting a healthier lifestyle.