spin bikes (aka spinning cycle or group cycle)

Dear All,
I am a student at Staffordshire University, studying a
BA(Hons) in Product Design. For my final year I am going to be
designing a new spin bike (aka spinning cycle or group cycle), but at
the moment my knowledge is limited. Who better to ask, than people who
are into fitness or cyclists? So in my investigation I was told to use
the Google Groups for help. In my research I will be looking at
existing Spin bikes. So if people could reply with problems that have
occurred when using the bikes, I would be very grateful. An example of
this could be sitting on the bike, paddling, or the general style.
This would be a great help to me and vital research for the project.

Thank you for your time and hope to hear from people, soon.