Originally Posted by
livedarklions
Do you have something that documents this? Gravity pushing things up makes no sense to me, and to the extent that gravity is giving an energy boost to the downward leg, if that boost were not countered by the energy needed to lift the other leg, wouldn't it then be imparted by transmission of the chain to the wheel?
Forget the legs, forget the rider, get rid of the chain. Put a 10 lb weight on one pedal, what happens? Now put 10 lbs on each pedal, what happens? With 10 lbs on each pedal, how hard do you have to push on one to make the crank spin?