Re: water weight

[Sarah Ralston <ralston@AESOP.RUTGERS.EDU>]

>Date: Wed, 22 Dec 1999 09:25:34 -0600
>To: Tivers@aol.com
>From: Sarah Ralston <ralston@aesop.rutgers.edu>
>Subject: Re: water weight
>In-Reply-To: <0.3ee5df8d.2591543f@aol.com>
>
>At 05:07 PM 12/21/99 -0500, you wrote:
>>In a message dated 12/21/99 9:34:25 AM Pacific Standard Time, 
>>michrowe@frontier.net writes:
>>
>><< Hmmm, I read this in Stephen Duren's article on Feeding the Endurance
Horse
>> and thought gut water content might be used to support blood plasma levels
>> (and ward off dehydration).  Nutrients move across the membrane - is water
>> not able to move through?
>> 
>> "The additional water and electrolytes in the digestive tract of the high
>> fiber animals is probably due to the high water holding capacity of plant
>> fiber. More importantly, the water and electrolyte pool created by a high
>> fiber diet can be used to combat dehydration and electrolyte imbalances
>> which derail so many endurance horses."
>> 
>> m >>
>>
>>
>>Don't know. Water will move across a membrane to an area of lower water 
>>concentration--that is, where the other components of the fluid are 
>>higher--salts, for example. That's why you can't drink salt water if you're 
>>dying of thirst on a desert island. Salt water in the gut pulls water from 
>>the circulation. 
>>
>
>Which is why we caution people not to over supplement 
>electrolytes-if the horse is dehydrated a large dose of 
>concentrated anything will draw water into the stomach 
>and intestine, away from the already compromised circulation.
>Concentrated salt solutions can also cause abdominal malaise 
>(cramping)-at least it did in my research ponies. If your
> horse fights you when you give it the electrolytes
>it probably associates them with discomfort.
>
>>How easily water moves from the gut to the circulation is not known to me, 
>>but I'd be glad to be educated on this point. One thing is for sure--the 
>>water released from glycogen burning is dumped directly into the
circulation.
>>
>>ti
>
>Water and electrolyte absorption from the large intestine is very efficient.
>The amount of water released from glycogen burning is miniscule in
relation to the sweat losses during endurance competitions and needs of the
exercising horse.
>
>Sarah and Fling


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