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Water turnover and changes in body composition during arduous wildfire suppression.

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Title: Water turnover and changes in body composition during arduous wildfire suppression.
Authors: Ruby BC (AUTHOR), Schoeller DA (AUTHOR), Sharkey BJ (AUTHOR), Burks C (AUTHOR), Tysk S (AUTHOR)
Source: Medicine & Science in Sports & Exercise. Oct2003, Vol. 35 Issue 10, p1760-1765. 6p.
Abstract: INTRODUCTION: Our lab has recently documented the total energy expenditure during arduous wildfire suppression using the doubly labeled water methodology. The elevated rates of isotopic elimination indicate an arduous working environment that may often compromise energy balance and overall hydration. PURPOSE: The purpose of this investigation was to determine the effects of arduous wildfire suppression on water turnover and changes in body composition in wildland firefighters (WLFF). METHODS: WLFF (N = 14) were studied during a 5-d period of arduous fire suppression work. A comparison group (N = 13) of recreationally active college students (RACS) was also studied. Water turnover was measured from rates of 2H elimination (rH2O). Urine osmolality, specific gravity, and skinfold measures were also collected. RESULTS: WLFF demonstrated a decrease in nude body weight (pre = 71.9 +/- 10.4 kg, post = 70.9 +/- 10.2 kg, P = 0.0001) and total body water (pre = 42.9 +/- 7.2 kg, post = 42.0 +/- 6.7 kg, P = 0.0046). RACS maintained total body water and body weight during the experimental period. Isotope (2H2O) dilution demonstrated that rH2O was significantly higher for the WLFF (rH2O = 6.7 +/- 1.4 and 3.8 +/- 1.0 L.24 h-1 for the WLFF and RACS, respectively). CONCLUSION: These results demonstrate an arduous work environment that threatens hydration, energy balance, and perhaps normal glycogen status. [ABSTRACT FROM AUTHOR]
Copyright of Medicine & Science in Sports & Exercise is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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DbLabel: Education Research Complete
An: 106746388
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  Data: Water turnover and changes in body composition during arduous wildfire suppression.
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  Data: <searchLink fieldCode="AR" term="%22Ruby+BC%22">Ruby BC</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schoeller+DA%22">Schoeller DA</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sharkey+BJ%22">Sharkey BJ</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Burks+C%22">Burks C</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tysk+S%22">Tysk S</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Medicine+%26+Science+in+Sports+%26+Exercise%22">Medicine & Science in Sports & Exercise</searchLink>. Oct2003, Vol. 35 Issue 10, p1760-1765. 6p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: INTRODUCTION: Our lab has recently documented the total energy expenditure during arduous wildfire suppression using the doubly labeled water methodology. The elevated rates of isotopic elimination indicate an arduous working environment that may often compromise energy balance and overall hydration. PURPOSE: The purpose of this investigation was to determine the effects of arduous wildfire suppression on water turnover and changes in body composition in wildland firefighters (WLFF). METHODS: WLFF (N = 14) were studied during a 5-d period of arduous fire suppression work. A comparison group (N = 13) of recreationally active college students (RACS) was also studied. Water turnover was measured from rates of 2H elimination (rH2O). Urine osmolality, specific gravity, and skinfold measures were also collected. RESULTS: WLFF demonstrated a decrease in nude body weight (pre = 71.9 +/- 10.4 kg, post = 70.9 +/- 10.2 kg, P = 0.0001) and total body water (pre = 42.9 +/- 7.2 kg, post = 42.0 +/- 6.7 kg, P = 0.0046). RACS maintained total body water and body weight during the experimental period. Isotope (2H2O) dilution demonstrated that rH2O was significantly higher for the WLFF (rH2O = 6.7 +/- 1.4 and 3.8 +/- 1.0 L.24 h-1 for the WLFF and RACS, respectively). CONCLUSION: These results demonstrate an arduous work environment that threatens hydration, energy balance, and perhaps normal glycogen status. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Medicine & Science in Sports & Exercise is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1249/01.mss.0000089348.39312.4d
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      – Code: eng
        Text: English
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              Text: Oct2003
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