Ab-Doer Twist Abdominal Trainer Abdominal-based workout that combines muscle toning with aerobic training State-of-the-art Torsion-Flex technology works hard-to-reach muscles Anatomically correct positioning minimizes stress and pain for increased efficiency Contouring arm bars for toning upper body muscles; comfortable swivel-action seat Includes workout DVD with 3 workouts Beginner, Intermediate and Advanced and the Quick Start Guide