Our Running Endurance class meets both Tuesday and Saturday and is a great way to build that Cardio Engine!RX300m fast200m easy (recovery)200m fast300m easy (recovery)Rest 60sec b/t sets.X 6Performance300m fast200m easy (recovery)200m fast300m easy (recovery)Rest 60sec b/t sets.X 5Fitness300m fast200m easy (recovery)200m fast300m easy (recovery)Rest 60sec b/t sets.X 4