Originally Posted by
DaveLeeNC
That would somehow seem to be an odd reaction for the body to make. Short of starvation there is pretty much always an ample supply of fat - the issue being the ability to metabolize it at a high rate.
dave
I agree, it's not about storing enough fat for the effort, since that would be a very small amount. I think weight gain is just a side effect of that kind of training unless you're really careful, due to the hormone shifts in cardio. (Kind of a junky link, but it links to several good studies on the topic.)
Targeted cardio for better fat loss results | Puravida Fitness