The Stark fitness facility is an Irvine-based private personal training facility focusing on fat loss and weight loss for men and women. Utilizing the world's highest quality equipment, some of the most sophisticated training techniques, as well as personalized diets and high quality supplements, Stark is a national leader in rapid transformation for executives. We are centrally located in Irvine. Our cross streets are Von Karman and Alton, close to the 405 near the Jamboree and MacArthur exits, just 5 minutes from the John Wayne Airport. Contact us for more information.