The Double Abs Shaper from Meerut Gym and Gymnastic Works is a lighter, narrower variant of the Sit-up Board. It is geared for school-aged children and young adults, but anybody looking for these specifications can use it. The exercises increase the strength of the abdominal muscles as well as the flex or community of hip and upper thigh muscles. Your whole core muscle community gets a workout at the Sit-up stop. On the Sit-up, there are two positions: one with the feet down and the other with the feet up and placed under the support frame in this Marino product.