<< Seriously??  What's a person to do when they feed fat for energy with a
 horse that normally has a little higher than desired heartrate anyway?
 
 Can you give me more meat on this?
 
 Joyce >>
Joyce,
This is just an extrapolation of the fact that fat burning doubles (at least)
the oxygen requirement vs carbohydrate burning. I don't really know what kind
of change you'd actually see.
ti