Springboard helps you work your quads, calves, glutes, lower tendons and abs and works hard to deliver fascial fitness. All of this are the foundation of building spring-like moves, greater endurance, improved athleticism and the kind of muscular control that transforms you entirely. Add EC to further challenge your VO2 Max and you've got yourself a workout that will take some time to master completely.
Extra Credit: 30 seconds rest between sets.