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Army study improves ability to predict drinking water needs
Date:7/8/2009

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BETHESDA, Md. (July 8, 2009) When soldiers leave base for a 3-day mission, how much water should they bring? Military planners and others have long wrestled with that question, but new research from the Journal of Applied Physiology may now provide them an accurate answer.

The study substantially improves a water needs equation that the U.S. Army developed in 1982. That equation, known as the Shapiro equation, overestimates water needs.

The study produced formulations that are 58-65% more accurate than the Shapiro equation, at least in the laboratory. If the new formula works in the field, as expected, it could accurately predict water needs not only for soldiers, but also for civilians who work or exercise outdoors.

The study, "Expanded prediction equations of human sweat loss and water needs," appears in the online
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Contact: Christine Guilfoy
cguilfoy@the-aps.org
301-634-7253
American Physiological Society
Source:Eurekalert

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