[masraum]

Originally Posted by wayner

If you are successful in doing higher intensity fasting workouts, my understanding is that it is because
a) You are already in really good shape and your system has become more efficient in converting
b) your intensity is staying low enough
c) your actually starting to burn protein form your muscles and decimate them

And C should come WAY down the list. Even marathon runners should have enough fat to power them for quite a long time.