Liquids lost swimming in hot water distance swim?

Given water is 87 degrees Given air is 90 degrees Distance 2 miles Time swimming time around 50 min. How much fluid will be lost (sweat)? Anyone want to hazard a guess? I am thinking 3 pints? = 3 pound... I plan to weigh myself prior to and after the race. Results should be interesting.
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  • How can you possibly measure amount of sweat produced during swimming? Per Wikipedia, which knows everything and then some, most fluid losses in humans occur in form of urine. Some is lost through sweat, some is lost through respiration (in form of water vapor), and a couple of other excretory forms also contribute minor amounts to fluid outgo. :) Wii breaks ... Call home, ET!
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  • How can you possibly measure amount of sweat produced during swimming? Per Wikipedia, which knows everything and then some, most fluid losses in humans occur in form of urine. Some is lost through sweat, some is lost through respiration (in form of water vapor), and a couple of other excretory forms also contribute minor amounts to fluid outgo. :) Wii breaks ... Call home, ET!
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