The final exercise portion of this workout is abs, and we basically did 3 exercises, each with the legs partially supported by the tubes.
First, single leg lowering. Lying on my back, with one leg down flat, lower (and then raise) the other leg. Alternate and do this on both legs.
Next, leg circles (both legs at the same time, both directions) still lying on my back.
And finally, a pilates exercise called the hundred, lying on my back, feet and head elevated, make 100 downward motions with my arms. I'm not sure the arm motions are for anything other than to keep my mind off the fact that I'm holing my legs and head in the air for 100 count.