Thanks for all your advice it's a guide and kinda what I expected, and yes it is for myself but it's complicated as I can't use my indoor exercise bike due to a rather large hernia waiting to be removed. My lower back is the problem at the moment and I need an aid to help me exercise indoor. Must be a stand up/on e.g. treadmill thing.
Would a 2nd hand one be worth it, say no more than €100
cheers