Build your center of power! Stronger Abs and Back shows how to develop the body's most important source of energy and support - its core muscle groups. The abdominal and back muscles form the foundation for enhanced fitness and athletic performance.<BR>Featuring 165 exercises and packed with training advice, this illustrated guide is your training manual to rock-hard abs and strong supportive back muscles that prevent low back injury and pain.<BR>Stronger Abs and Back is for athletes and fitness enthusiasts who want firm, high-performance bodies.