From shapely abs to the "Pilates Powerhouse," core strengthening has become the main focus for today's exercise enthusiasts. Now, Ultimate Core Ball Workout takes core training to a higher level with its on-the-ball variations of traditional mat exercises.

The unique benefits of ball training enable the program in Ultimate Core Ball Workout to produce better results in less time. Any crunch will work the abs, but this book's crunch on the ball simultaneously engages the stabilizing muscles of the abdomen and lower body, working more muscle and producing a more sculpted...