Hydration: How Much Is Too Much Water?

For years the military has been at the fore-front of experiments using humans and their recent tests on hydration are following suit. The April 2009 study examined volunteers in a laboratory "under varying conditions of work intensity and duration, environmental conditions such as temperature and humidity, and types of clothing." Some of these variable were chosen in order to better refine, and perhaps replace, the formula that has been used since 1982 to determine sweat rate and water needs. Water accounts for a large percentage of the military's cost when sending soldiers overseas. They must take into account it's price, storage, piping, distribution, sourcing, etc so honing in on the needs is paramount to a successful mission. This new formula shows promise at being more accurate and allows for water needs to be estimated for a person working 8 hours vs the old standard of 2 hours. Technology has brought about changes in clothing that helps soldiers with temperature regulation and thus changes their sweat rate and the amount of water they need to stay hydrated. Early indicators show the new formula to be accurate...
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