On some thread I think you said you wanted to get rid of your spasticity.
This abstract suggests cycling (no resistance) might help with spasticity.
This provides converging evidence for the anti-spastic potential of acute unloaded leg cycling in individuals with MS.
I tried it when I had spasticity and found the spasticity lessened significantly after about 10 minutes on the machine.
My spasticity seems to be history for the moment but I attribute that to switching from Avonex to Copaxone since spasticity can be a side effect of the interferons. It could be the exercise though too as I've stuck with the cycling routine as part of my exercise "regimen".
Just a possibility......