Interesting question WantsMore...

I agree with Carbs, muscle tone is a good thing, and cycling is a good way to get there.

I was wondering if how you ride the bike would effect muscle/leg development? i.e. if you spin more (push a lighter gear, but spin the pedals more) would you burn more fat but build less muscle than if you pedal slow and push a heavy gear?

Generally I spin more just because my knees hurt if I pedal too hard for long... And it's generally considered better form, but it's still an interesting question.

--nw