I think this is doable. OKay, I made this exercise bicycle in Poser. Now, I would like to have a master dial that would turn the pedals and wheel together. At the moment, I have to set the dial for the wheel, each pedal, and the pedal bar individually. I am thinking there should be a way to link these together so that one dial could be used to turn these parts in unison. Er, at least I am hoping it can be done. :O)

Btw, on the figure. I used a closed IK loop on the legs. Never tried this before, but it worked. I parented the figures hips to the bike, then used the change parent to parent each foot to a pedal, this resulted in the figure moving as the pedal turns. When I first tried it, I did not parent the hip first and the figures body bobbed up and down rather than remaining seated. Live and learn.