| The effects of heat and exercise on sweat iron loss. | |
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MedLine Citation:
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PMID: 8775154 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Arm sweat was collected from nine male and nine female athletes sitting in a hot environment (HR, 40 degrees C) and exercising at 50% VO2max in neutral (NE, 25 degrees C) and hot (HE, 35 degrees C) environments to compare sweat iron concentrations and losses. Whole body sweat rate was determined from weight loss at 30-min intervals for 1 h. Sweat iron concentration was significantly higher during HR and NE than during HE, but was not significantly different between males and females. During exercise, sweat iron concentration decreased significantly from 30 to 60 min. Whole body sweat rates differed significantly across all environments with the highest rate in HE and the lowest in HR. Males lost significantly more sweat during exercise than females, but the difference at rest was not significant. Estimated whole body iron loss was significantly greater during exercise (NE = 0.08 mg.m-2.h-1, HE = 0.077 mg.m-2.h-1) than rest (0.039 mg.m-2.h-1), and the average iron loss was significantly greater in males (0.09 mg.m-2.h-1) than females (0.04 mg.m-2.h-1). Results suggest that the use of resting sweat iron concentration to estimate iron loss for 1 h of exercise in neutral environments is accurate but may overestimate iron loss during exercise in hot environments and during more prolonged exercise. |
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Authors:
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M F Waller; E M Haymes |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 28 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 1996 Feb |
Date Detail:
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Created Date: 1996-12-04 Completed Date: 1996-12-04 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 197-203 Citation Subset: IM; S |
Affiliation:
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Department of Nutrition, Food and Movement Sciences, Florida State University, Tallahassee 32306-2033, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Exercise / physiology* Female Ferritins / analysis Hot Temperature* Humans Iron / analysis* Male Sweat / chemistry* |
| Chemical | |
Reg. No./Substance:
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7439-89-6/Iron; 9007-73-2/Ferritins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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