We want more than flat abs! This intense 15-minute workout focuses on developing core stability. Core stability, a factor in all of our kickboxing classes, is developed by focus on strengthening your “core.” The core is the combination of abdominal, oblique, and back muscles. A strong core provides stability as a result of developing balance and strength. Get started with an Introductory . Its sequence of exercises and intensity of training is designed to build strength, power and endurance that transcends the training environment into day-to-day functionality. This advanced training “environment” uses movements that: