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alsESSSSSSSSSSSSSAY - Human hydration is very important for...

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Human hydration is very important for regulating all of the human body’s various life processes, from the digestive system to the reproductive system and plays a major part in the thermotolerance of the human body. On average, the human body’s water intake is 60 percent fluids, 30 percent from food, and 10 percent from metabolic water, which is water released in the body when one burns fats and carbohydrates (Burfoot 52). It can then be assumed that active people actually replenish some of the water lost during exercise with metabolic water. A study by the Laboratory of Exercise Physiology at Hiroshima University in Higashihiroshima, Japan submitted a study in September 2004 studying the combined effects of pre-cooling and water ingestion on thermoregulation and physical capacity during exercise in a hot environment. The experiment was held at conditions of 32 degrees Celsius and 80 percent relative humidity. The untrained subjects exercised for one hour on a cycle ergometer at 60 percent maximum oxygen uptake at differing hydration states: no water intake, pre-cooling, water ingestion, and a combination of pre-cooling and water ingestion. The experiment was then repeated at 80 percent maximum oxygen uptake until exhaustion. Before the first exercise, rectal and skin temperatures were lower in the Pre-cooling and Combined conditions than in the No Water and Water conditions. After the first exercise, the Combined condition invoked the lowest temperature, followed by Pre-cooling, Water, then No water. In the second exercise, the time to exhaustion was longer in the Combined section. Therefore, the combination of pre-cooling and water ingestion during exercise increases endurance in a
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This note was uploaded on 04/20/2008 for the course ALS 2931 taught by Professor Hahn during the Spring '08 term at University of Florida.

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alsESSSSSSSSSSSSSAY - Human hydration is very important for...

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