Take out the two curved arm bars and insert one into each end of the overhead support bar. Insert the small screws so that the screw heads face up when the Ab Roller is placed on the floor. Tighten the screws with the provided Allen wrench.
Place the head rest onto the lower support bar, and fasten tightly with two long screws.
Insert the each side bar into one end of the lower bar and fasten with two short screws.
Put the nylon cover over the Pro-Assist Spring with the small opening of the spring at the top. Then place the protective cap over the nylon casing and spring.
Attach the Pro-Assist Springs to the back of the head rest using two short screws. Once everything is put together, make sure the Ab Roller is sturdy and all of the screws are tightened well.