After 20 years in the fitness training business, Billy Borja is now the owner/franchisee of La Jolla’s Orangetheory Fitness Studio at 7734 Girard Ave. Boria explains that the studio’s intense 60-minute heart rate-monitored training program is designed to help participants create excess oxygen consumption, which helps them build energy that pushes them into the “orange zone,” where calories are burned while the body is toned.