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water weight



At 11:57 AM 12/22/99 -0500, you wrote:
>
>And that's net loss? Body Weight before and after? 
>Assuming that, and for the ske of argument, let's
> say that no water or substrate intake during the ride 
>counts. Then 40 lbs of net water loss would require
> 10 lbs of glycogen burning, if the substrate burned 
>was all glycogen (again, just assuming). So, the question 
>is, can 10 lbs of glycogen be used up in a 100 mile race?
>
>ti

Once again, Tom, you are obsessing on your glycogen. 
Are you implying that you can get 4 lbs of water 
released from one pound of glycogen??? You've 
found a way to create matter? As I amended, the 
sweat losses were actually 65 to 100 lbs (which, 
if you were as up on the literature as you claim 
to be you should have nailed me for!). If there 
were no substrate intake at all (hey guys, let's 
try that!) the animal would also be burning fat 
(since the insulin levels would be very low) which
also releases a little metabolic water. However, 
the losses are way in excess of the metabolic water
release, which is insufficient to meet the needs 
of even non-exercising animals.

I also loved your "proof" that CPK's don't 
reflect muscle damage in horses. Swimming rats???
Yes there are isoenzymes from other sources but 
if there was sufficient damage to the gut,
kidney or heart tissues to release the amount 
of CPK we frequently see after rides, that horse
would still be in a world of trouble!

Sarah and Fling


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