The Core X System transforms your vital core into the master link in a chain of muscle movement that connects your upper and lower body together for integrated, full body muscle toning and super intense, low impact fat burning cardio. What makes the Core X System this fast and effective? Core X movement creates a muscle shaping shortcut called sequential muscle activation. It engages muscles in the most efficient progression, creating a never-ending domino effect of muscle shaping. Upper and lower body muscles are linked through simultaneous shaping. As you strengthen arms, chest, and shoulders, you simultaneously tone abs, buns, and thighs. It's total body muscle conditioning, empowered by your core, through small movements that deliver big, body shaping results.