CROSSFIT is a strength and conditioning program that is Constantly Varied High Intensity Functional Movement. Workouts are typically short- 20 minutes or less- and intense, demanding all out physical exertion. They combine movements such as sprinting, rowing, jumping rope, climbing rope, weightlifting, and carrying odd objects; they use barbells, dumbbells, gymnastics rings, pull-up bars, kettlebells, medicine balls, and many bodyweight exercises.These elements are mixed in numerous combinations to form prescribed "Workouts of the Day" or "WODs". Hour-long classes typically include a warm-up, a skill development segment, the high-intensity WOD, and a period of individual or group stretching.