It is a 30-minute High-Intensity Interval Training (HIIT) workout, using an indoor bike to achieve fast results. It's a quick and hard style of training that returns rapid results with minimum joint impact. The short duration of a LES MILLS SPRINT workout will motivate you to push your physical and mental limits. It features bursts of intensity where you work as hard as possible, followed by periods of rest that prepare you for the next effort. The payoff is you will smash your fitness goals and burn calories for hours after each workout.