OTF is looking for Fitness Coaches to lead our coach-inspired, science-backed, and technology-tracked workouts. About Orangetheory Fitness Orangetheory is a 1-hour, full-body heart rate zone and strength training workout that delivers a more personalized experience in a group setting. Designed to be effective and efficient, our workout classes boost metabolism, burn fat and calories, build strength and confidence, and improve overall fitness.