Body-Solid Pro-Dual Ab/Back Machine DABB-SFAchieve a 6 pack that will make people sit up and take notice A strong, functional torso requires well defined abdominals and lower back. A successful workout of these complex muscle groups demands a routine built upon a foundation of consistency. Body Solid's ProDual Ab Crunch Back Extension features a unique rotation position that provides correct, crunch style movement for maximum abdominal contraction. The adjustable seat and foot hold down