Take your performance over the rainbow by adding a dynamic dimension to your workouts and challenge your core stability, cardiovascular endurance, strength and flexibility - all at the same time. This product is designed to challenge your core stability, cardiovascular endurance, strength and flexibility - all at the same time. Can be used to move forward, backward, side-to-side and rotate your body without restrictions for optimal functional sports movement. By simply widening or narrowing your hand or foot positioning, you can increase or decrease the level of difficulty of each exercise.