| Field studies of exercise and food deprivation. | |
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MedLine Citation:
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PMID: 17053420 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE OF REVIEW: The increase in obesity in developed societies drives interest in the interplay of energy intake, metabolic energy expenditure, and body energy stores. A better understanding of energy management in physically active and undernourished humans should help guide strategies to manage obesity safely and effectively. This review focuses on field studies of men and women engaged in prolonged strenuous activities, ranging from ranger training to extreme expeditions. RECENT FINDINGS: Although scientifically unconventional and limited, field studies of exercise and food deprivation have yielded interesting findings: 4-5% body fat is the normal lower limit to fat reserves in physically active underfed young adult men, and in response to exercise and underfeeding, women used more fat mass and less fat-free mass to meet metabolic fuel requirements. SUMMARY: Field studies have shown that fat energy reserves in young adult men can be estimated as percentage body fat minus 5%, and initial body fat mass has a significant positive influence on fat oxidation rates per kilogram of fat-free mass during rapid weight loss associated with underfeeding and exercise. Data logging pedometers, activity monitors, global positioning systems, and wireless body and personal-area networks promise to make it easier to study and care for free-living humans. |
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Authors:
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Reed W Hoyt; Karl E Friedl |
Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Current opinion in clinical nutrition and metabolic care Volume: 9 ISSN: 1363-1950 ISO Abbreviation: Curr Opin Clin Nutr Metab Care Publication Date: 2006 Nov |
Date Detail:
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Created Date: 2006-10-20 Completed Date: 2007-01-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9804399 Medline TA: Curr Opin Clin Nutr Metab Care Country: England |
Other Details:
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Languages: eng Pagination: 685-90 Citation Subset: IM |
Affiliation:
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Biophysics and Biomedical Modeling Division, US Army Research Institute of Environmental Medicine, Kansas Street, Natick, MA 01760, USA. reed.hoyt@us.army.mil |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adipose Tissue
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metabolism* Body Composition / physiology* Energy Metabolism / physiology* Exercise / physiology* Food Deprivation / physiology* Humans Obesity / prevention & control, therapy Oxidation-Reduction Oxygen Consumption / physiology |
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