Re: RC: Re: water weight

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

At 11:35 AM 12/22/99 -0500, you wrote:
>In a message dated 12/22/99 8:26:42 AM Pacific Standard Time, Tivers@aol.com 
>writes:
>
><< So, in excess of 25 lbs? >>
>
>25 pounds of what?  Water released from the burning of glycogen?  If that
was 
>what you were referring to, that's only slightly over 3 gallons.  Or, one 
>nice drink in the overall course of a 100-mile ride.
>
>Heidi
>

25 lbs of water from Glycogen?? heck of a lot of burning going on there. 
I also would like to correct my previous response-the water loss I quoted
was in kilograms, 
not lbs-so it was actiually 65-110 POUNDS of water! That's 8 to 12 gallons
of water.
We measured sweat losses of yearlings trotting on a treadmill a few years ago-
they were doing a steady trot for 30 minutes and lost 8 to 10 lbs of weight
(we corrected for fecal losses) in only 1/2 hour. Schott et al estimated that 
endurance horses in a 50 mile race lost 6.6 to 9 liters of water per hour.
 Of course losses vary with conditions.
Bottom line-let those horses drink!

Also-to convert glucose from mg/dl to mmol/l you merely divide by 18-so 100
mg/dl
is 5.5 mmol/L.

Sarah and Fling


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