This Ab Machine design has taken hip flexors, arms, and shoulders out of the movement, the resulting exercise is completely focused on the abdominal muscles. The easy-access with no restricting pads makes the Ab Machine one of the most popular pieces on the gym floor. Hip pad includes a lumbar curved section to promote full range of motion exercise beginning in extension. From small to tall without getting off the machine. The gas spring-assisted adjustable foot bar accommodates user height variation and allows adjustment from the seated position.