Quote Originally Posted by GLC1968 View Post
For the example Sundial gave, I assumed that Baily and his aunt were walking together (over the same distance) and therefore were going the same speed. His aunt put forth more effort because she was carrying more weight.

If you have limited time for your workout, taking the heavier bike and riding it the same speed (for example: a 15 mile loop on your lunch hour), would give you a better workout.
Indeed - if all other factors are equal, then heavier will be a better workout, but the original question was about wether a heavier bike for less time was equal or better to a lighter bike for twice the amount of time. To keep everything else equal, I think you would have to do a great deal of monitoring. It's very easy to just slow down when you are carrying more weight....