Orangetheory® Fitness (www.orangetheoryfitness.com) is a science-based, one-of-a-kind, group personal training workout broken into intervals of cardiovascular and strength training. Backed by the science of excess post-exercise oxygen consumption (EPOC), Orangetheory's heart-rate-monitored workouts are designed to get participants within the target-training zone of 84-to-91 percent of their heart ...