Thank you for your quick response.I guess I will have to wait for another sleepless night and hope to see it again. To the best of my recollection it looked like a standard folding chair with various attachments. Sorry I can't be more specific, I only saw it once.
I do try to exercise, but it's difficult, especially at this time of year. My house has no sidewalk, I have a partially healed tib-patella break, have suffered numerous concussions throughout my life (something about somewhat reckless horseback riding!). I discovered last summer that I cannot even ride a bike any more. My active life is going downhill rapidly. I need all the help I can get. I thank you for your help. If I find out more about this mythical chair. I will let you know, Meanwhile, thank you for your help - Jmiini