SPRINT is a 30 Minute High -Intensity Interval Training (HIIT) workout using an indoor bike. Its a quick and hard style of training that returns rapid results with minimal joint impact. 30 Minutes of LES MILLS SPRINT workout will motivate you to push your physical limits. It features burst 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 burn calories for hours after a good HIIT workout.