I am selling an AB TRIMMER, I believe it was an Argos make. It has a padded headrest and arm rests. If you google AbTrimmer you will see the sort of equipment it is, there are lots of styles. I can't get the hang of adding a picture !
This one has a green padded hand bar. It comes apart to fold for storage.
I also have a double use AB wheel which has similar benefits with foot holds at one end of an elasticated belt and a wheel at the other. Sell both for £15.
pm if you want a look , no obligation.