Originally Posted by
Drew Eckhardt
Neither. You have to have to lift your weight relative to the treadmill's moving surface and overcome friction as you do outdoors but only have aerodynamic drag from the spinning wheels and not moving through their which is less than outdoors because the top of the tires is moving at the treadmill speed not double the road speed.
I didn't really understand your response about lifting your weight but it sounds like b) minus aero drag? The steeper the incline the smaller the aero effects.
You could, of course duplicate the aero effects if you were riding in a wind tunnel or had a big enough fan
