I find that my Hurricane recumebnt doesnt give me as much back/hamstring pain as any of my uprights, except perhaps my old 4 speed Raleigh All Steel. Does anyone know whether there is anything in this ? ie Are recumbents better for your back and hamstrings ( I am 54, have had back problems and tight hamstrings for about 25 years and find that the only bike which does not upset my back is a recumbent, I have about 10 upright bikes which I ride often, the thing about a recumebnt is that more or less you can slide yourself up or down in the seat at will so I feel it isnt only down to 'fit' ) I agree with CloinJ though about spinning.